diff --git a/recipe_modules/repo_util/api.py b/recipe_modules/repo_util/api.py
index 9d5f9fd..7a2946e 100644
--- a/recipe_modules/repo_util/api.py
+++ b/recipe_modules/repo_util/api.py
@@ -15,18 +15,19 @@
 
 # TODO(keyonghan): deprecate when all repos are migrated to main.
 REPO_BRANCHES = {
-  'flutter': 'master',
-  'engine': 'main',
-  'cocoon': 'main',
-  'infra': 'main',
-  'packages': 'main',
-  'plugins': 'main',
-  'openpay': 'main',
+    'flutter': 'master',
+    'engine': 'main',
+    'cocoon': 'main',
+    'infra': 'main',
+    'packages': 'main',
+    'plugins': 'main',
+    'openpay': 'main',
 }
 
 import re
 from recipe_engine import recipe_api
 
+
 class RepoUtilApi(recipe_api.RecipeApi):
   """Provides utilities to work with flutter repos."""
 
@@ -88,7 +89,8 @@
                                                  ] = 'got_engine_revision'
             step_result = self.m.bot_update.ensure_checkout()
             if ('got_revision' in step_result.presentation.properties and
-                step_result.presentation.properties['got_revision'] == 'BOT_UPDATE_NO_REV_FOUND'):
+                step_result.presentation.properties['got_revision']
+                == 'BOT_UPDATE_NO_REV_FOUND'):
               raise self.m.step.StepFailure('BOT_UPDATE_NO_REV_FOUND')
             self.m.gclient.runhooks()
           except:
@@ -250,6 +252,21 @@
       ).stdout.strip()
       return commit
 
+  def run_flutter_doctor(self):
+    self.m.retry.step(
+        'flutter doctor',
+        ['flutter', 'doctor', '--verbose'],
+        max_attempts=3,
+        timeout=300,
+    )
+
+  def get_env_commit(self):
+    '''Get the commit sha of the current repo from env.'''
+    gitiles_commit = self.m.buildbucket.gitiles_commit.id
+    if gitiles_commit:
+      return gitiles_commit
+    return self.m.properties.get('git_ref', 'led')
+
   def current_commit_branches(self, checkout_path):
     """Gets the list of branches for the current commit."""
     with self.m.step.nest('Identify branches'):
@@ -331,7 +348,8 @@
             self.get_commit(checkout_path)
     }
     if self.m.properties.get('gn_artifacts', False):
-      env['FLUTTER_STORAGE_BASE_URL'] = 'https://storage.googleapis.com/flutter_archives_v2'
+      env['FLUTTER_STORAGE_BASE_URL'
+         ] = 'https://storage.googleapis.com/flutter_archives_v2'
     env_prefixes = {'PATH': ['%s' % str(flutter_bin), '%s' % str(dart_bin)]}
     return env, env_prefixes
 
diff --git a/recipe_modules/repo_util/examples/full.expected/basic.json b/recipe_modules/repo_util/examples/full.expected/basic.json
index 7710cc1..e50d660 100644
--- a/recipe_modules/repo_util/examples/full.expected/basic.json
+++ b/recipe_modules/repo_util/examples/full.expected/basic.json
@@ -587,6 +587,15 @@
     ]
   },
   {
+    "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
     "cmd": [],
     "name": "Identify branches (2)"
   },
@@ -752,7 +761,7 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CACHE]/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'src/flutter', 'url': 'https://flutter.googlesource.com/mirrors/engine'}]",
+      "cache_dir = '[CACHE]/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'src/flutter', 'url': 'https://github.com/flutter/engine'}]",
       "--revision_mapping_file",
       "{\"got_engine_revision\": \"src/flutter\"}",
       "--git-cache-dir",
@@ -762,7 +771,9 @@
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
-      "src/flutter@HEAD"
+      "src/flutter@refs/pull/1/head",
+      "--refs",
+      "refs/pull/1/head"
     ],
     "cwd": "[START_DIR]/engine",
     "env": {
@@ -788,19 +799,19 @@
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"fixed_revisions\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/flutter\": \"HEAD\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"src/flutter\": \"refs/pull/1/head\"@@@",
       "@@@STEP_LOG_LINE@json.output@  }, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"manifest\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"src/flutter\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/src/flutter.git\", @@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"9221bca00ddbd888260084def81f09543281b952\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"a63681edc0f69a72604596b16c7986513e809995\"@@@",
       "@@@STEP_LOG_LINE@json.output@    }@@@",
       "@@@STEP_LOG_LINE@json.output@  }, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"patch_failure\": false, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"patch_root\": \"src/flutter\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"properties\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"got_engine_revision\": \"9221bca00ddbd888260084def81f09543281b952\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"got_engine_revision_cp\": \"refs/heads/main@{#84512}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_engine_revision\": \"a63681edc0f69a72604596b16c7986513e809995\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_engine_revision_cp\": \"refs/pull/1/head@{#84512}\", @@@",
       "@@@STEP_LOG_LINE@json.output@    \"got_revision\": \"9221bca00ddbd888260084def81f09543281b952\"@@@",
       "@@@STEP_LOG_LINE@json.output@  }, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"root\": \"src/flutter\", @@@",
@@ -809,7 +820,7 @@
       "@@@STEP_LOG_LINE@json.output@      \"src/flutter\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
       "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/src/flutter.git\", @@@",
-      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"9221bca00ddbd888260084def81f09543281b952\"@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"a63681edc0f69a72604596b16c7986513e809995\"@@@",
       "@@@STEP_LOG_LINE@json.output@        }@@@",
       "@@@STEP_LOG_LINE@json.output@      }@@@",
       "@@@STEP_LOG_LINE@json.output@    }, @@@",
@@ -818,8 +829,8 @@
       "@@@STEP_LOG_LINE@json.output@  \"step_text\": \"Some step text\"@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@",
-      "@@@SET_BUILD_PROPERTY@got_engine_revision@\"9221bca00ddbd888260084def81f09543281b952\"@@@",
-      "@@@SET_BUILD_PROPERTY@got_engine_revision_cp@\"refs/heads/main@{#84512}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_engine_revision@\"a63681edc0f69a72604596b16c7986513e809995\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_engine_revision_cp@\"refs/pull/1/head@{#84512}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_revision@\"9221bca00ddbd888260084def81f09543281b952\"@@@"
     ]
   },
diff --git a/recipe_modules/repo_util/examples/full.expected/bot_update.json b/recipe_modules/repo_util/examples/full.expected/bot_update.json
index 05fa9ac..9a42012 100644
--- a/recipe_modules/repo_util/examples/full.expected/bot_update.json
+++ b/recipe_modules/repo_util/examples/full.expected/bot_update.json
@@ -556,6 +556,15 @@
   },
   {
     "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
+    "cmd": [
       "git",
       "rev-parse",
       "HEAD"
diff --git a/recipe_modules/repo_util/examples/full.expected/failed_flutter_environment.json b/recipe_modules/repo_util/examples/full.expected/failed_flutter_environment.json
index 28d8a25..ed44b07 100644
--- a/recipe_modules/repo_util/examples/full.expected/failed_flutter_environment.json
+++ b/recipe_modules/repo_util/examples/full.expected/failed_flutter_environment.json
@@ -555,6 +555,15 @@
     ]
   },
   {
+    "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
     "cmd": [],
     "name": "Flutter Environment",
     "~followup_annotations": [
diff --git a/recipe_modules/repo_util/examples/full.expected/first_bot_update_failed.json b/recipe_modules/repo_util/examples/full.expected/first_bot_update_failed.json
index 17d565e..e8bb049 100644
--- a/recipe_modules/repo_util/examples/full.expected/first_bot_update_failed.json
+++ b/recipe_modules/repo_util/examples/full.expected/first_bot_update_failed.json
@@ -556,6 +556,15 @@
   },
   {
     "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
+    "cmd": [
       "git",
       "rev-parse",
       "HEAD"
diff --git a/recipe_modules/repo_util/examples/full.expected/first_bot_update_revision_not_found.json b/recipe_modules/repo_util/examples/full.expected/first_bot_update_revision_not_found.json
index cc1ca0d..4a1b57e 100644
--- a/recipe_modules/repo_util/examples/full.expected/first_bot_update_revision_not_found.json
+++ b/recipe_modules/repo_util/examples/full.expected/first_bot_update_revision_not_found.json
@@ -556,6 +556,15 @@
   },
   {
     "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
+    "cmd": [
       "git",
       "rev-parse",
       "HEAD"
diff --git a/recipe_modules/repo_util/examples/full.expected/monorepo.json b/recipe_modules/repo_util/examples/full.expected/monorepo.json
index e15369d..c62fb8e 100644
--- a/recipe_modules/repo_util/examples/full.expected/monorepo.json
+++ b/recipe_modules/repo_util/examples/full.expected/monorepo.json
@@ -975,6 +975,27 @@
   },
   {
     "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
+    "cmd": [
       "git",
       "rev-parse",
       "HEAD"
diff --git a/recipe_modules/repo_util/examples/full.expected/monorepo_first_bot_update_failed.json b/recipe_modules/repo_util/examples/full.expected/monorepo_first_bot_update_failed.json
index c8ea136..f2b62b1 100644
--- a/recipe_modules/repo_util/examples/full.expected/monorepo_first_bot_update_failed.json
+++ b/recipe_modules/repo_util/examples/full.expected/monorepo_first_bot_update_failed.json
@@ -975,6 +975,27 @@
   },
   {
     "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
+    "cmd": [
       "git",
       "rev-parse",
       "HEAD"
diff --git a/recipe_modules/repo_util/examples/full.expected/monorepo_wrong_host.json b/recipe_modules/repo_util/examples/full.expected/monorepo_wrong_host.json
index c02a688..c5a0665 100644
--- a/recipe_modules/repo_util/examples/full.expected/monorepo_wrong_host.json
+++ b/recipe_modules/repo_util/examples/full.expected/monorepo_wrong_host.json
@@ -975,6 +975,27 @@
   },
   {
     "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
+    "cmd": [
       "git",
       "rev-parse",
       "HEAD"
@@ -1003,9 +1024,9 @@
       "The recipe has crashed at point 'Uncaught exception'!",
       "",
       "Traceback (most recent call last):",
-      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/examples/full.py\", line 30, in RunSteps",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/examples/full.py\", line 42, in RunSteps",
       "    api.repo_util.monorepo_checkout(api.path['start_dir'], {}, {})",
-      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/api.py\", line 125, in monorepo_checkout",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/api.py\", line 127, in monorepo_checkout",
       "    raise ValueError(",
       "ValueError('Input reference is not on dart.googlesource.com/monorepo')"
     ]
diff --git a/recipe_modules/repo_util/examples/full.py b/recipe_modules/repo_util/examples/full.py
index 4ab0af5..b993058 100644
--- a/recipe_modules/repo_util/examples/full.py
+++ b/recipe_modules/repo_util/examples/full.py
@@ -16,12 +16,24 @@
 def RunSteps(api):
   flutter_checkout_path = api.path['start_dir'].join('flutter')
   api.repo_util.get_branch(flutter_checkout_path)
-  api.repo_util.checkout('flutter', flutter_checkout_path, ref='refs/heads/master')
-  api.repo_util.checkout('engine', api.path['start_dir'].join('engine'), ref='refs/heads/main')
-  api.repo_util.checkout('cocoon', api.path['start_dir'].join('cocoon'), ref='refs/heads/main')
-  api.repo_util.checkout('packages', api.path['start_dir'].join('packages'), ref='refs/heads/main')
+  api.repo_util.checkout(
+      'flutter', flutter_checkout_path, ref='refs/heads/master'
+  )
+  api.repo_util.checkout(
+      'engine', api.path['start_dir'].join('engine'), ref='refs/heads/main'
+  )
+  api.repo_util.checkout(
+      'cocoon', api.path['start_dir'].join('cocoon'), ref='refs/heads/main'
+  )
+  api.repo_util.checkout(
+      'packages', api.path['start_dir'].join('packages'), ref='refs/heads/main'
+  )
   # we need an override because all of the previous step calls on checkout directly overrides the ref variable
-  api.repo_util.checkout('flutter', flutter_checkout_path, ref= 'refs/heads/beta')
+  api.repo_util.checkout(
+      'flutter', flutter_checkout_path, ref='refs/heads/beta'
+  )
+  api.repo_util.run_flutter_doctor()
+  api.repo_util.get_env_commit()
 
   env, env_paths = api.repo_util.engine_environment(flutter_checkout_path)
   env, env_paths = api.repo_util.flutter_environment(flutter_checkout_path)
@@ -38,14 +50,37 @@
   yield (
       api.test(
           'basic',
-          api.properties(git_branch='beta', gn_artifacts='true'),
-          api.repo_util.flutter_environment_data(),
-          api.step_data('Identify branches.git rev-parse', stdout=api.raw_io.output_text('abchash')),
-          api.step_data('Identify branches.git branch', stdout=api.raw_io.output_text('branch1\nbranch2')),
-          api.step_data('Identify branches (2).git branch', stdout=api.raw_io.output_text('branch1\nbranch2')),
-          api.step_data('Identify branches (3).git branch', stdout=api.raw_io.output_text('branch1\nbranch2')))
+          api.properties(
+              git_branch='beta',
+              gn_artifacts='true',
+              git_url='https://github.com/flutter/engine',
+              git_ref='refs/pull/1/head'
+          ), api.repo_util.flutter_environment_data(),
+          api.step_data(
+              'Identify branches.git rev-parse',
+              stdout=api.raw_io.output_text('abchash')
+          ),
+          api.step_data(
+              'Identify branches.git branch',
+              stdout=api.raw_io.output_text('branch1\nbranch2')
+          ),
+          api.step_data(
+              'Identify branches (2).git branch',
+              stdout=api.raw_io.output_text('branch1\nbranch2')
+          ),
+          api.step_data(
+              'Identify branches (3).git branch',
+              stdout=api.raw_io.output_text('branch1\nbranch2')
+          )
+      )
   )
-  yield api.test('failed_flutter_environment')
+  yield api.test(
+      'failed_flutter_environment',
+      api.properties(
+          git_url='https://github.com/flutter/engine',
+          git_ref='refs/pull/1/head'
+      )
+  )
   yield api.test(
       'monorepo', api.repo_util.flutter_environment_data(),
       api.buildbucket.ci_build(
@@ -78,8 +113,7 @@
               git_url='https://github.com/flutter/engine',
               git_ref='refs/pull/1/head'
           )
-      ) +
-      api.repo_util.flutter_environment_data()
+      ) + api.repo_util.flutter_environment_data()
   )
   yield (
       api.test(
@@ -104,10 +138,13 @@
       ) +
       # Next line force a fail condition for the bot update
       # first execution.
-      api.path.exists(api.path['cache'].join('git'), api.path['start_dir'].join('engine')) +
-      api.override_step_data(
+      api.path.exists(
+          api.path['cache'].join('git'), api.path['start_dir'].join('engine')
+      ) + api.override_step_data(
           "Checkout source code.bot_update",
-          api.json.output({'properties': {'got_revision': 'BOT_UPDATE_NO_REV_FOUND'}}),
-          retcode=0) +
-      api.repo_util.flutter_environment_data()
+          api.json.output({
+              'properties': {'got_revision': 'BOT_UPDATE_NO_REV_FOUND'}
+          }),
+          retcode=0
+      ) + api.repo_util.flutter_environment_data()
   )
diff --git a/recipe_modules/repo_util/examples/unsupported.expected/unsupported.json b/recipe_modules/repo_util/examples/unsupported.expected/unsupported.json
index 6bae8d8..b449ffa 100644
--- a/recipe_modules/repo_util/examples/unsupported.expected/unsupported.json
+++ b/recipe_modules/repo_util/examples/unsupported.expected/unsupported.json
@@ -9,7 +9,7 @@
       "Traceback (most recent call last):",
       "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/examples/unsupported.py\", line 13, in RunSteps",
       "    api.repo_util.checkout('unsupported_repo', repo_dir)",
-      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/api.py\", line 200, in checkout",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/api.py\", line 202, in checkout",
       "    raise ValueError('Unsupported repo: %s' % name)",
       "ValueError('Unsupported repo: unsupported_repo')"
     ]
diff --git a/recipes/devicelab/devicelab_drone_build_test.expected/artifact does not exist.json b/recipes/devicelab/devicelab_drone_build_test.expected/artifact does not exist.json
new file mode 100644
index 0000000..57655b9
--- /dev/null
+++ b/recipes/devicelab/devicelab_drone_build_test.expected/artifact does not exist.json
@@ -0,0 +1,984 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
+      "--",
+      "RECIPE_REPO[depot_tools]/gsutil.py",
+      "----",
+      "ls",
+      "gs://flutter_devicelab/flutter/2d72510e447ab60a9728aeea2362d8be2cbd7789/def"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "gsutil list"
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[CLEANUP]/tmp_tmp_1/flutter sdk",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
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+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info (2)"
+  },
+  {
+    "cmd": [
+      "bb",
+      "batch",
+      "-host",
+      "cr-buildbucket.appspot.com"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "buildbucket.schedule",
+    "stdin": "{\"requests\": [{\"scheduleBuild\": {\"builder\": {\"bucket\": \"ci\", \"builder\": \"Linux Devicelab Test Drone\", \"project\": \"test\"}, \"exe\": {\"cipdVersion\": \"refs/heads/master\"}, \"experimental\": \"NO\", \"experiments\": {\"luci.buildbucket.parent_tracking\": false}, \"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,updateTime\", \"gitilesCommit\": {\"host\": \"git.example.com\", \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\", \"project\": \"test/repo\", \"ref\": \"refs/heads/main\"}, \"priority\": 25, \"properties\": {\"artifact\": \"def\", \"dependencies\": [], \"task_name\": \"abc\"}, \"requestId\": \"8945511751514863184-00000000-0000-0000-0000-000000001337\", \"swarming\": {\"parentRunId\": \"fake-task-id\"}, \"tags\": [{\"key\": \"parent_buildbucket_id\", \"value\": \"8945511751514863184\"}, {\"key\": \"user_agent\", \"value\": \"recipe\"}]}}]}",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"responses\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"scheduleBuild\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"builder\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"bucket\": \"ci\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"builder\": \"Linux Devicelab Test Drone\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"project\": \"test\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }, @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"id\": \"8922054662172514000\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@STEP_LOG_LINE@request@{@@@",
+      "@@@STEP_LOG_LINE@request@  \"requests\": [@@@",
+      "@@@STEP_LOG_LINE@request@    {@@@",
+      "@@@STEP_LOG_LINE@request@      \"scheduleBuild\": {@@@",
+      "@@@STEP_LOG_LINE@request@        \"builder\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"bucket\": \"ci\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"builder\": \"Linux Devicelab Test Drone\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"project\": \"test\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"exe\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"cipdVersion\": \"refs/heads/master\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"experimental\": \"NO\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"experiments\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"luci.buildbucket.parent_tracking\": false@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,updateTime\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"gitilesCommit\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"host\": \"git.example.com\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"project\": \"test/repo\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"ref\": \"refs/heads/main\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"priority\": 25, @@@",
+      "@@@STEP_LOG_LINE@request@        \"properties\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"artifact\": \"def\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"dependencies\": [], @@@",
+      "@@@STEP_LOG_LINE@request@          \"task_name\": \"abc\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"requestId\": \"8945511751514863184-00000000-0000-0000-0000-000000001337\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"swarming\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"parentRunId\": \"fake-task-id\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"tags\": [@@@",
+      "@@@STEP_LOG_LINE@request@          {@@@",
+      "@@@STEP_LOG_LINE@request@            \"key\": \"parent_buildbucket_id\", @@@",
+      "@@@STEP_LOG_LINE@request@            \"value\": \"8945511751514863184\"@@@",
+      "@@@STEP_LOG_LINE@request@          }, @@@",
+      "@@@STEP_LOG_LINE@request@          {@@@",
+      "@@@STEP_LOG_LINE@request@            \"key\": \"user_agent\", @@@",
+      "@@@STEP_LOG_LINE@request@            \"value\": \"recipe\"@@@",
+      "@@@STEP_LOG_LINE@request@          }@@@",
+      "@@@STEP_LOG_LINE@request@        ]@@@",
+      "@@@STEP_LOG_LINE@request@      }@@@",
+      "@@@STEP_LOG_LINE@request@    }@@@",
+      "@@@STEP_LOG_LINE@request@  ]@@@",
+      "@@@STEP_LOG_LINE@request@}@@@",
+      "@@@STEP_LOG_END@request@@@",
+      "@@@STEP_LINK@8922054662172514000@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Task Shards",
+    "~followup_annotations": [
+      "@@@STEP_LINK@@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "buildbucket.collect"
+  },
+  {
+    "cmd": [
+      "bb",
+      "collect",
+      "-host",
+      "cr-buildbucket.appspot.com",
+      "-interval",
+      "60s",
+      "8922054662172514000"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "buildbucket.collect.wait",
+    "timeout": 10800,
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "bb",
+      "batch",
+      "-host",
+      "cr-buildbucket.appspot.com"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "buildbucket.collect.get",
+    "stdin": "{\"requests\": [{\"getBuild\": {\"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,summaryMarkdown,updateTime\", \"id\": \"8922054662172514000\"}}]}",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"responses\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"getBuild\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"id\": \"8922054662172514000\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"status\": \"SUCCESS\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@STEP_LOG_LINE@request@{@@@",
+      "@@@STEP_LOG_LINE@request@  \"requests\": [@@@",
+      "@@@STEP_LOG_LINE@request@    {@@@",
+      "@@@STEP_LOG_LINE@request@      \"getBuild\": {@@@",
+      "@@@STEP_LOG_LINE@request@        \"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,summaryMarkdown,updateTime\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"id\": \"8922054662172514000\"@@@",
+      "@@@STEP_LOG_LINE@request@      }@@@",
+      "@@@STEP_LOG_LINE@request@    }@@@",
+      "@@@STEP_LOG_LINE@request@  ]@@@",
+      "@@@STEP_LOG_LINE@request@}@@@",
+      "@@@STEP_LOG_END@request@@@",
+      "@@@STEP_LINK@8922054662172514000@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "display builds"
+  },
+  {
+    "cmd": [],
+    "name": "display builds.",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LINK@8922054662172514000@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_drone_build_test.expected/artifact exists.json b/recipes/devicelab/devicelab_drone_build_test.expected/artifact exists.json
new file mode 100644
index 0000000..5168991
--- /dev/null
+++ b/recipes/devicelab/devicelab_drone_build_test.expected/artifact exists.json
@@ -0,0 +1,175 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "name": "OS info"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
+      "--",
+      "RECIPE_REPO[depot_tools]/gsutil.py",
+      "----",
+      "ls",
+      "gs://flutter_devicelab/flutter/refs/pull/1/head/def"
+    ],
+    "infra_step": true,
+    "name": "gsutil list"
+  },
+  {
+    "cmd": [
+      "bb",
+      "batch",
+      "-host",
+      "cr-buildbucket.appspot.com"
+    ],
+    "infra_step": true,
+    "name": "buildbucket.schedule",
+    "stdin": "{\"requests\": [{\"scheduleBuild\": {\"builder\": {\"builder\": \"Linux Devicelab Test Drone\"}, \"exe\": {\"cipdVersion\": \"refs/heads/master\"}, \"experimental\": \"NO\", \"experiments\": {\"luci.buildbucket.parent_tracking\": false}, \"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,updateTime\", \"priority\": 25, \"properties\": {\"artifact\": \"def\", \"dependencies\": [], \"task_name\": \"abc\"}, \"requestId\": \"0-00000000-0000-0000-0000-000000001337\", \"swarming\": {\"parentRunId\": \"fake-task-id\"}, \"tags\": [{\"key\": \"parent_buildbucket_id\", \"value\": \"0\"}, {\"key\": \"user_agent\", \"value\": \"recipe\"}]}}]}",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"responses\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"scheduleBuild\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"builder\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"builder\": \"Linux Devicelab Test Drone\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }, @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"id\": \"8922054662172514000\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@STEP_LOG_LINE@request@{@@@",
+      "@@@STEP_LOG_LINE@request@  \"requests\": [@@@",
+      "@@@STEP_LOG_LINE@request@    {@@@",
+      "@@@STEP_LOG_LINE@request@      \"scheduleBuild\": {@@@",
+      "@@@STEP_LOG_LINE@request@        \"builder\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"builder\": \"Linux Devicelab Test Drone\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"exe\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"cipdVersion\": \"refs/heads/master\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"experimental\": \"NO\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"experiments\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"luci.buildbucket.parent_tracking\": false@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,updateTime\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"priority\": 25, @@@",
+      "@@@STEP_LOG_LINE@request@        \"properties\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"artifact\": \"def\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"dependencies\": [], @@@",
+      "@@@STEP_LOG_LINE@request@          \"task_name\": \"abc\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"requestId\": \"0-00000000-0000-0000-0000-000000001337\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"swarming\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"parentRunId\": \"fake-task-id\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"tags\": [@@@",
+      "@@@STEP_LOG_LINE@request@          {@@@",
+      "@@@STEP_LOG_LINE@request@            \"key\": \"parent_buildbucket_id\", @@@",
+      "@@@STEP_LOG_LINE@request@            \"value\": \"0\"@@@",
+      "@@@STEP_LOG_LINE@request@          }, @@@",
+      "@@@STEP_LOG_LINE@request@          {@@@",
+      "@@@STEP_LOG_LINE@request@            \"key\": \"user_agent\", @@@",
+      "@@@STEP_LOG_LINE@request@            \"value\": \"recipe\"@@@",
+      "@@@STEP_LOG_LINE@request@          }@@@",
+      "@@@STEP_LOG_LINE@request@        ]@@@",
+      "@@@STEP_LOG_LINE@request@      }@@@",
+      "@@@STEP_LOG_LINE@request@    }@@@",
+      "@@@STEP_LOG_LINE@request@  ]@@@",
+      "@@@STEP_LOG_LINE@request@}@@@",
+      "@@@STEP_LOG_END@request@@@",
+      "@@@STEP_LINK@8922054662172514000@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Task Shards",
+    "~followup_annotations": [
+      "@@@STEP_LINK@@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "buildbucket.collect"
+  },
+  {
+    "cmd": [
+      "bb",
+      "collect",
+      "-host",
+      "cr-buildbucket.appspot.com",
+      "-interval",
+      "60s",
+      "8922054662172514000"
+    ],
+    "infra_step": true,
+    "name": "buildbucket.collect.wait",
+    "timeout": 10800,
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "bb",
+      "batch",
+      "-host",
+      "cr-buildbucket.appspot.com"
+    ],
+    "infra_step": true,
+    "name": "buildbucket.collect.get",
+    "stdin": "{\"requests\": [{\"getBuild\": {\"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,summaryMarkdown,updateTime\", \"id\": \"8922054662172514000\"}}]}",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"responses\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"getBuild\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"id\": \"8922054662172514000\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"status\": \"SUCCESS\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@STEP_LOG_LINE@request@{@@@",
+      "@@@STEP_LOG_LINE@request@  \"requests\": [@@@",
+      "@@@STEP_LOG_LINE@request@    {@@@",
+      "@@@STEP_LOG_LINE@request@      \"getBuild\": {@@@",
+      "@@@STEP_LOG_LINE@request@        \"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,summaryMarkdown,updateTime\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"id\": \"8922054662172514000\"@@@",
+      "@@@STEP_LOG_LINE@request@      }@@@",
+      "@@@STEP_LOG_LINE@request@    }@@@",
+      "@@@STEP_LOG_LINE@request@  ]@@@",
+      "@@@STEP_LOG_LINE@request@}@@@",
+      "@@@STEP_LOG_END@request@@@",
+      "@@@STEP_LINK@8922054662172514000@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "display builds"
+  },
+  {
+    "cmd": [],
+    "name": "display builds.",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LINK@8922054662172514000@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_drone_build_test.expected/local-engine.json b/recipes/devicelab/devicelab_drone_build_test.expected/local-engine.json
new file mode 100644
index 0000000..83e8d51
--- /dev/null
+++ b/recipes/devicelab/devicelab_drone_build_test.expected/local-engine.json
@@ -0,0 +1,1155 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
+      "--",
+      "RECIPE_REPO[depot_tools]/gsutil.py",
+      "----",
+      "ls",
+      "gs://flutter_devicelab/flutter/2d72510e447ab60a9728aeea2362d8be2cbd7789/def"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "gsutil list"
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[CLEANUP]/tmp_tmp_1/flutter sdk",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
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+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill dart",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "flutter"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "java"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill java",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "adb"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill adb",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info (2)"
+  },
+  {
+    "cmd": [
+      "bb",
+      "batch",
+      "-host",
+      "cr-buildbucket.appspot.com"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "buildbucket.schedule",
+    "stdin": "{\"requests\": [{\"scheduleBuild\": {\"builder\": {\"bucket\": \"ci\", \"builder\": \"Linux Devicelab Test Drone\", \"project\": \"test\"}, \"exe\": {\"cipdVersion\": \"refs/heads/master\"}, \"experimental\": \"NO\", \"experiments\": {\"luci.buildbucket.parent_tracking\": false}, \"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,updateTime\", \"gitilesCommit\": {\"host\": \"git.example.com\", \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\", \"project\": \"test/repo\", \"ref\": \"refs/heads/master\"}, \"priority\": 25, \"properties\": {\"artifact\": \"def\", \"dependencies\": [], \"task_name\": \"abc\"}, \"requestId\": \"8945511751514863184-00000000-0000-0000-0000-000000001337\", \"swarming\": {\"parentRunId\": \"fake-task-id\"}, \"tags\": [{\"key\": \"parent_buildbucket_id\", \"value\": \"8945511751514863184\"}, {\"key\": \"user_agent\", \"value\": \"recipe\"}]}}]}",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"responses\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"scheduleBuild\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"builder\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"bucket\": \"ci\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"builder\": \"Linux Devicelab Test Drone\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"project\": \"test\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }, @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"id\": \"8922054662172514000\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@STEP_LOG_LINE@request@{@@@",
+      "@@@STEP_LOG_LINE@request@  \"requests\": [@@@",
+      "@@@STEP_LOG_LINE@request@    {@@@",
+      "@@@STEP_LOG_LINE@request@      \"scheduleBuild\": {@@@",
+      "@@@STEP_LOG_LINE@request@        \"builder\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"bucket\": \"ci\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"builder\": \"Linux Devicelab Test Drone\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"project\": \"test\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"exe\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"cipdVersion\": \"refs/heads/master\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"experimental\": \"NO\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"experiments\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"luci.buildbucket.parent_tracking\": false@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,updateTime\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"gitilesCommit\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"host\": \"git.example.com\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"id\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"project\": \"test/repo\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"ref\": \"refs/heads/master\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"priority\": 25, @@@",
+      "@@@STEP_LOG_LINE@request@        \"properties\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"artifact\": \"def\", @@@",
+      "@@@STEP_LOG_LINE@request@          \"dependencies\": [], @@@",
+      "@@@STEP_LOG_LINE@request@          \"task_name\": \"abc\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"requestId\": \"8945511751514863184-00000000-0000-0000-0000-000000001337\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"swarming\": {@@@",
+      "@@@STEP_LOG_LINE@request@          \"parentRunId\": \"fake-task-id\"@@@",
+      "@@@STEP_LOG_LINE@request@        }, @@@",
+      "@@@STEP_LOG_LINE@request@        \"tags\": [@@@",
+      "@@@STEP_LOG_LINE@request@          {@@@",
+      "@@@STEP_LOG_LINE@request@            \"key\": \"parent_buildbucket_id\", @@@",
+      "@@@STEP_LOG_LINE@request@            \"value\": \"8945511751514863184\"@@@",
+      "@@@STEP_LOG_LINE@request@          }, @@@",
+      "@@@STEP_LOG_LINE@request@          {@@@",
+      "@@@STEP_LOG_LINE@request@            \"key\": \"user_agent\", @@@",
+      "@@@STEP_LOG_LINE@request@            \"value\": \"recipe\"@@@",
+      "@@@STEP_LOG_LINE@request@          }@@@",
+      "@@@STEP_LOG_LINE@request@        ]@@@",
+      "@@@STEP_LOG_LINE@request@      }@@@",
+      "@@@STEP_LOG_LINE@request@    }@@@",
+      "@@@STEP_LOG_LINE@request@  ]@@@",
+      "@@@STEP_LOG_LINE@request@}@@@",
+      "@@@STEP_LOG_END@request@@@",
+      "@@@STEP_LINK@8922054662172514000@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Task Shards",
+    "~followup_annotations": [
+      "@@@STEP_LINK@@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "buildbucket.collect"
+  },
+  {
+    "cmd": [
+      "bb",
+      "collect",
+      "-host",
+      "cr-buildbucket.appspot.com",
+      "-interval",
+      "60s",
+      "8922054662172514000"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "buildbucket.collect.wait",
+    "timeout": 10800,
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "bb",
+      "batch",
+      "-host",
+      "cr-buildbucket.appspot.com"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "buildbucket.collect.get",
+    "stdin": "{\"requests\": [{\"getBuild\": {\"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,summaryMarkdown,updateTime\", \"id\": \"8922054662172514000\"}}]}",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"responses\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"getBuild\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"id\": \"8922054662172514000\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"status\": \"SUCCESS\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@STEP_LOG_LINE@request@{@@@",
+      "@@@STEP_LOG_LINE@request@  \"requests\": [@@@",
+      "@@@STEP_LOG_LINE@request@    {@@@",
+      "@@@STEP_LOG_LINE@request@      \"getBuild\": {@@@",
+      "@@@STEP_LOG_LINE@request@        \"fields\": \"builder,createTime,createdBy,critical,endTime,id,infra,input,number,output,startTime,status,summaryMarkdown,updateTime\", @@@",
+      "@@@STEP_LOG_LINE@request@        \"id\": \"8922054662172514000\"@@@",
+      "@@@STEP_LOG_LINE@request@      }@@@",
+      "@@@STEP_LOG_LINE@request@    }@@@",
+      "@@@STEP_LOG_LINE@request@  ]@@@",
+      "@@@STEP_LOG_LINE@request@}@@@",
+      "@@@STEP_LOG_END@request@@@",
+      "@@@STEP_LINK@8922054662172514000@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "display builds"
+  },
+  {
+    "cmd": [],
+    "name": "display builds.",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LINK@8922054662172514000@https://cr-buildbucket.appspot.com/build/8922054662172514000@@@"
+    ]
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_drone_build_test.expected/no-artifact-name.json b/recipes/devicelab/devicelab_drone_build_test.expected/no-artifact-name.json
new file mode 100644
index 0000000..3359ba7
--- /dev/null
+++ b/recipes/devicelab/devicelab_drone_build_test.expected/no-artifact-name.json
@@ -0,0 +1,33 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "name": "OS info"
+  },
+  {
+    "cmd": [],
+    "name": "RECIPE CRASH (Uncaught exception)",
+    "~followup_annotations": [
+      "@@@STEP_EXCEPTION@@@",
+      "The recipe has crashed at point 'Uncaught exception'!",
+      "",
+      "Traceback (most recent call last):",
+      "  File \"RECIPE_REPO[flutter]/recipes/devicelab/devicelab_drone_build_test.py\", line 67, in RunSteps",
+      "    raise ValueError('An artifact property is required')",
+      "ValueError('An artifact property is required')"
+    ]
+  },
+  {
+    "failure": {
+      "humanReason": "Uncaught Exception: ValueError('An artifact property is required')"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_drone_build_test.expected/no-task-name.json b/recipes/devicelab/devicelab_drone_build_test.expected/no-task-name.json
new file mode 100644
index 0000000..b37d94c
--- /dev/null
+++ b/recipes/devicelab/devicelab_drone_build_test.expected/no-task-name.json
@@ -0,0 +1,33 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "name": "OS info"
+  },
+  {
+    "cmd": [],
+    "name": "RECIPE CRASH (Uncaught exception)",
+    "~followup_annotations": [
+      "@@@STEP_EXCEPTION@@@",
+      "The recipe has crashed at point 'Uncaught exception'!",
+      "",
+      "Traceback (most recent call last):",
+      "  File \"RECIPE_REPO[flutter]/recipes/devicelab/devicelab_drone_build_test.py\", line 62, in RunSteps",
+      "    raise ValueError('A task_name property is required')",
+      "ValueError('A task_name property is required')"
+    ]
+  },
+  {
+    "failure": {
+      "humanReason": "Uncaught Exception: ValueError('A task_name property is required')"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_drone_build_test.py b/recipes/devicelab/devicelab_drone_build_test.py
new file mode 100644
index 0000000..334c557
--- /dev/null
+++ b/recipes/devicelab/devicelab_drone_build_test.py
@@ -0,0 +1,251 @@
+# Copyright 2020 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+PYTHON_VERSION_COMPATIBILITY = 'PY3'
+
+DEPS = [
+    'depot_tools/gsutil',
+    'flutter/devicelab_osx_sdk',
+    'flutter/display_util',
+    'flutter/flutter_deps',
+    'flutter/logs_util',
+    'flutter/os_utils',
+    'flutter/osx_sdk',
+    'flutter/repo_util',
+    'flutter/retry',
+    'flutter/shard_util',
+    'flutter/shard_util_v2',
+    'flutter/test_utils',
+    'flutter/token_util',
+    'fuchsia/git',
+    'recipe_engine/buildbucket',
+    'recipe_engine/cas',
+    'recipe_engine/context',
+    'recipe_engine/file',
+    'recipe_engine/json',
+    'recipe_engine/path',
+    'recipe_engine/platform',
+    'recipe_engine/properties',
+    'recipe_engine/raw_io',
+    'recipe_engine/runtime',
+    'recipe_engine/step',
+    'recipe_engine/swarming',
+]
+
+# Thirty minutes
+MAX_TIMEOUT_SECS = 30 * 60
+# GCS bucket for flutter devicelab build app artifacts.
+DEVICELAB_BUCKET = 'flutter_devicelab'
+
+
+def check_artifact_exist(api, url):
+  '''Checks if the build artifact already exists in the bucket.'''
+  artifacts_exist = None
+  step_result = api.gsutil.list(
+      url, stdout=api.raw_io.output_text(), ok_ret='any'
+  ).stdout.rstrip()
+  if step_result == url:
+    artifacts_exist = True
+  else:
+    artifacts_exist = False
+  return artifacts_exist
+
+
+def RunSteps(api):
+  # Collect memory/cpu/process before task execution.
+  api.os_utils.collect_os_info()
+
+  api.os_utils.print_pub_certs()
+  task_name = api.properties.get("task_name")
+  if not task_name:
+    raise ValueError('A task_name property is required')
+
+  commit_sha = api.repo_util.get_env_commit()
+  artifact = api.properties.get('artifact', None)
+  if not artifact:
+    raise ValueError('An artifact property is required')
+  artifact_gcs_dir = 'flutter/%s' % commit_sha
+  artifact_gcs_path = '%s/%s' % (artifact_gcs_dir, artifact)
+  artifact_exist = check_artifact_exist(
+      api, 'gs://%s/%s' % (DEVICELAB_BUCKET, artifact_gcs_path)
+  )
+  # Run build step.
+  if not artifact_exist:
+    build(api, task_name, artifact, artifact_gcs_dir)
+
+  # Run test step.
+  builds = test(
+      api, task_name, api.properties.get('dependencies', []), artifact
+  )
+  builds = api.shard_util.collect_builds(builds)
+  api.display_util.display_builds(
+      step_name='display builds',
+      builds=builds,
+      raise_on_failure=True,
+  )
+
+
+def test(api, task_name, deps, artifact):
+  '''Run devicelab test assuming build artifact is available.'''
+  git_branch = api.properties.get('git_branch')
+  reqs = []
+  # These are dependencies specified in the yaml file. We want to pass them down
+  # to test so they also install these dependencies.
+  test_props = {
+      'dependencies': [api.shard_util_v2.unfreeze_dict(dep) for dep in deps],
+      'task_name': task_name,
+      'artifact': artifact,
+  }
+
+  req = api.buildbucket.schedule_request(
+      swarming_parent_run_id=api.swarming.task_id,
+      builder='Linux Devicelab Test Drone',
+      properties=test_props,
+      priority=25,
+      exe_cipd_version=api.properties.get(
+          'exe_cipd_version', 'refs/heads/%s' % git_branch
+      )
+  )
+  reqs.append(req)
+  return api.buildbucket.schedule(reqs)
+
+
+def build(api, task_name, artifact, artifact_gcs_dir):
+  '''Run devicelab build to collect the artifact.'''
+  flutter_path = api.path.mkdtemp().join('flutter sdk')
+  api.repo_util.checkout(
+      'flutter',
+      flutter_path,
+      api.properties.get('git_url'),
+      api.properties.get('git_ref'),
+  )
+
+  env, env_prefixes = api.repo_util.flutter_environment(flutter_path)
+  with api.step.nest('Dependencies'):
+    api.flutter_deps.flutter_engine(env, env_prefixes)
+    deps = api.properties.get('dependencies', [])
+    # TODO: If deps contains dart_sdk and we are running a local engine,
+    # we don't want to fetch it with cipd, so don't fetch it with required_deps
+    api.flutter_deps.required_deps(env, env_prefixes, deps)
+
+  devicelab_path = flutter_path.join('dev', 'devicelab')
+  git_branch = api.properties.get('git_branch')
+
+  # Run test
+  runner_params = [
+      '-t', task_name, '--luci-builder',
+      api.properties.get('buildername')
+  ]
+  # Build taskArgs
+
+  artifact_dir = api.path.mkdtemp()
+  api.file.ensure_directory('mkdir %s' % artifact, artifact_dir.join(artifact))
+  artifact_path = artifact_dir.join(artifact)
+  runner_params.extend([
+      '--task-args', 'build', '--task-args',
+      'application-binary-path=%s' % artifact_path
+  ])
+  if 'LOCAL_ENGINE' in env:
+    runner_params.extend(['--local-engine', env['LOCAL_ENGINE']])
+  # LUCI git checkouts end up in a detached HEAD state, so branch must
+  # be passed from gitiles -> test runner -> Cocoon.
+  if git_branch and api.properties.get('git_url') is None:
+    # git_branch is set only when the build was triggered on post-submit.
+    runner_params.extend(['--git-branch', git_branch])
+  with api.context(env=env, env_prefixes=env_prefixes, cwd=devicelab_path):
+    api.repo_util.run_flutter_doctor()
+    api.step('dart pub get', ['dart', 'pub', 'get'], infra_step=True)
+    dep_list = {d['dependency']: d.get('version') for d in deps}
+    if 'xcode' not in dep_list:
+      with api.context(env=env, env_prefixes=env_prefixes):
+        api.repo_util.run_flutter_doctor()
+        test_runner_command = ['dart', 'bin/test_runner.dart', 'test']
+        test_runner_command.extend(runner_params)
+        try:
+          api.test_utils.run_test(
+              'build %s' % task_name,
+              test_runner_command,
+              timeout_secs=MAX_TIMEOUT_SECS
+          )
+          api.gsutil.upload(
+              bucket='flutter_devicelab',
+              source=artifact_dir,
+              dest=artifact_gcs_dir,
+              link_name='artifacts',
+              args=['-r'],
+              multithreaded=True,
+              name='upload artifacts',
+              unauthenticated_url=True
+          )
+        finally:
+          debug_after_failure(api, task_name)
+
+
+def debug_after_failure(api, task_name):
+  """Collect OS debug info."""
+  api.os_utils.kill_processes()
+  # Collect memory/cpu/process after task execution.
+  api.os_utils.collect_os_info()
+
+
+def GenTests(api):
+  checkout_path = api.path['cleanup'].join('tmp_tmp_1', 'flutter sdk')
+  yield api.test(
+      "no-task-name",
+      api.expect_exception('ValueError'),
+  )
+  yield api.test(
+      "no-artifact-name",
+      api.properties(
+          buildername='Linux abc', task_name='abc', git_ref='refs/pull/1/head'
+      ),
+      api.expect_exception('ValueError'),
+  )
+  yield api.test(
+      "artifact exists",
+      api.properties(
+          buildername='Linux abc',
+          task_name='abc',
+          git_branch='master',
+          artifact='def',
+          git_ref='refs/pull/1/head'
+      ),
+      api.repo_util.flutter_environment_data(checkout_dir=checkout_path),
+      api.step_data(
+          'gsutil list',
+          stdout=api.raw_io
+          .output_text('gs://flutter_devicelab/flutter/refs/pull/1/head/def')
+      ),
+  )
+  yield api.test(
+      "artifact does not exist",
+      api.properties(
+          buildername='Linux abc',
+          task_name='abc',
+          git_branch='master',
+          artifact='def',
+          git_ref='refs/pull/1/head'
+      ),
+      api.repo_util.flutter_environment_data(checkout_dir=checkout_path),
+      api.buildbucket.ci_build(
+          project='test',
+          git_repo='git.example.com/test/repo',
+      ),
+  )
+  yield api.test(
+      "local-engine",
+      api.properties(
+          buildername='Linux abc',
+          task_name='abc',
+          artifact='def',
+          local_engine_cas_hash='isolatehashlocalengine/22',
+          local_engine='host-release',
+          git_branch='master',
+      ), api.repo_util.flutter_environment_data(checkout_dir=checkout_path),
+      api.buildbucket.ci_build(
+          project='test',
+          git_repo='git.example.com/test/repo',
+          git_ref='refs/heads/master',
+      )
+  )
diff --git a/recipes/devicelab/devicelab_test_drone.expected/artifact-exists.json b/recipes/devicelab/devicelab_test_drone.expected/artifact-exists.json
new file mode 100644
index 0000000..bc7d7b8
--- /dev/null
+++ b/recipes/devicelab/devicelab_test_drone.expected/artifact-exists.json
@@ -0,0 +1,880 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "name": "OS info"
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[CLEANUP]/tmp_tmp_1/flutter sdk",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "name": "Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "refs/pull/1/head",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "name": "Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "name": "Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "name": "Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "name": "Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "name": "Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "name": "Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "log",
+      "--pretty=format:%ct",
+      "-n",
+      "1"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "name": "git commit time",
+    "timeout": 600.0
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "name": "git rev-parse"
+  },
+  {
+    "cmd": [],
+    "name": "Initialize logs"
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[CLEANUP]/flutter_logs_dir"
+    ],
+    "infra_step": true,
+    "name": "Initialize logs.Ensure [CLEANUP]/flutter_logs_dir",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "",
+      "[CLEANUP]/flutter_logs_dir/noop.txt"
+    ],
+    "infra_step": true,
+    "name": "Initialize logs.Write noop file",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Dependencies"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
+      "--",
+      "RECIPE_REPO[depot_tools]/gsutil.py",
+      "----",
+      "cp",
+      "-r",
+      "gs://flutter_devicelab/flutter/refs/pull/1/head/def",
+      "[CLEANUP]/tmp_tmp_2"
+    ],
+    "infra_step": true,
+    "name": "gsutil download artifact"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
+    "cmd": [
+      "dart",
+      "pub",
+      "get"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "dart pub get"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "name": "flutter doctor (2)",
+    "timeout": 300
+  },
+  {
+    "cmd": [
+      "dart",
+      "bin/test_runner.dart",
+      "test",
+      "-t",
+      "abc",
+      "--results-file",
+      "[CLEANUP]/results_tmp_1/results",
+      "--luci-builder",
+      "Linux abc",
+      "--task-args",
+      "test",
+      "--task-args",
+      "application-binary-path=[CLEANUP]/tmp_tmp_2/def",
+      "--git-branch",
+      "master"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "name": "run abc",
+    "timeout": 1800,
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@test_stdout@@@@",
+      "@@@STEP_LOG_END@test_stdout@@@",
+      "@@@STEP_LOG_LINE@test_stderr@@@@",
+      "@@@STEP_LOG_END@test_stderr@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "process logs"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
+      "--",
+      "RECIPE_REPO[depot_tools]/gsutil.py",
+      "-m",
+      "----",
+      "cp",
+      "-r",
+      "[CLEANUP]/flutter_logs_dir",
+      "gs://flutter_logs/flutter/00000000-0000-0000-0000-000000001337/abc/00000000-0000-0000-0000-000000001337"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "process logs.gsutil upload logs 00000000-0000-0000-0000-000000001337",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LINK@archive logs@https://console.cloud.google.com/storage/browser/flutter_logs/flutter/00000000-0000-0000-0000-000000001337/abc/00000000-0000-0000-0000-000000001337@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[CLEANUP]/flutter_logs_dir",
+      "*"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "process logs.logs",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@glob@[CLEANUP]/flutter_logs_dir/a.txt@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "log links",
+    "~followup_annotations": [
+      "@@@STEP_LINK@myfile.txt@https://storage.googleapis.com/flutter_logs/flutter/00000000-0000-0000-0000-000000001337/abc/00000000-0000-0000-0000-000000001337/myfile.txt@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "listdir",
+      "[CLEANUP]/flutter_logs_dir",
+      "--recursive"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "log links.List logs path",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@listdir@[CLEANUP]/flutter_logs_dir/myfile.txt@@@",
+      "@@@STEP_LOG_END@listdir@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Killing Processes"
+  },
+  {
+    "cmd": [
+      "pkill",
+      "chrome"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "Killing Processes.kill chrome",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "dart"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "Killing Processes.kill dart",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "flutter"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "Killing Processes.kill flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "java"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "Killing Processes.kill java",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "adb"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "Killing Processes.kill adb",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "OS info (2)"
+  },
+  {
+    "cmd": [],
+    "name": "Upload metrics"
+  },
+  {
+    "cmd": [
+      "luci-auth",
+      "token",
+      "-scopes",
+      "https://www.googleapis.com/auth/cloud-platform https://www.googleapis.com/auth/datastore",
+      "-lifetime",
+      "3m"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "Upload metrics.get access token for default account",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "extra.secret.token.should.not.be.logged",
+      "[CLEANUP]/tmp_tmp_3"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "Upload metrics.write metric center token",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "luci-auth",
+      "token",
+      "-lifetime",
+      "3m"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "Upload metrics.get access token for default account (2)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "extra.secret.token.should.not.be.logged",
+      "[CLEANUP]/tmp_tmp_4"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "Upload metrics.write cocoon token",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart",
+      "bin/test_runner.dart",
+      "upload-metrics",
+      "--test-flaky",
+      "False",
+      "--builder-bucket",
+      "",
+      "--git-branch",
+      "master",
+      "--luci-builder",
+      "Linux abc",
+      "--test-status",
+      "Succeeded",
+      "--service-account-token-file",
+      "[CLEANUP]/tmp_tmp_4"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GCP_PROJECT": "flutter-infra",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "1",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+      "TOKEN_PATH": "[CLEANUP]/tmp_tmp_3"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "name": "Upload metrics.upload results",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_test_drone.expected/basic.json b/recipes/devicelab/devicelab_test_drone.expected/basic.json
new file mode 100644
index 0000000..259a8e7
--- /dev/null
+++ b/recipes/devicelab/devicelab_test_drone.expected/basic.json
@@ -0,0 +1,1513 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info"
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[CLEANUP]/tmp_tmp_1/flutter sdk",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "2d72510e447ab60a9728aeea2362d8be2cbd7789"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
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+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "java"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill java",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "adb"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill adb",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info (2)"
+  },
+  {
+    "cmd": [
+      "echo",
+      "test run is flaky"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "step is flaky: run abc"
+  },
+  {
+    "cmd": [],
+    "name": "Upload metrics"
+  },
+  {
+    "cmd": [
+      "luci-auth",
+      "token",
+      "-scopes",
+      "https://www.googleapis.com/auth/cloud-platform https://www.googleapis.com/auth/datastore",
+      "-lifetime",
+      "3m"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics.get access token for default account",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "extra.secret.token.should.not.be.logged",
+      "[CLEANUP]/tmp_tmp_3"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics.write metric center token",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "luci-auth",
+      "token",
+      "-lifetime",
+      "3m"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics.get access token for default account (2)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "extra.secret.token.should.not.be.logged",
+      "[CLEANUP]/tmp_tmp_4"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics.write cocoon token",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart",
+      "bin/test_runner.dart",
+      "upload-metrics",
+      "--test-flaky",
+      "True",
+      "--builder-bucket",
+      "ci",
+      "--results-file",
+      "[CLEANUP]/results_tmp_1/results",
+      "--commit-time",
+      "",
+      "--task-name",
+      "abc",
+      "--benchmark-tags",
+      "{\"arch\": \"intel\", \"device_type\": \"none\", \"device_version\": \"none\", \"host_type\": \"linux\"}",
+      "--service-account-token-file",
+      "[CLEANUP]/tmp_tmp_4"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GCP_PROJECT": "flutter-infra",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+      "TOKEN_PATH": "[CLEANUP]/tmp_tmp_3"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics.upload results",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "RECIPE_MODULE[recipe_engine::cas]/resources/infra.sha1",
+      "/path/to/tmp/"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "read infra revision",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@infra.sha1@git_revision:mock_infra_git_revision@@@",
+      "@@@STEP_LOG_END@infra.sha1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "install infra/tools/luci/cas"
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/cipd_tool/infra/tools/luci/cas/git_revision%3Amock_infra_git_revision"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "install infra/tools/luci/cas.ensure package directory",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[START_DIR]/cipd_tool/infra/tools/luci/cas/git_revision%3Amock_infra_git_revision",
+      "-ensure-file",
+      "infra/tools/luci/cas/${platform} git_revision:mock_infra_git_revision",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "install infra/tools/luci/cas.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:moc\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/luci/cas/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "[START_DIR]/cipd_tool/infra/tools/luci/cas/git_revision%3Amock_infra_git_revision/cas",
+      "archive",
+      "-cas-instance",
+      "projects/example-cas-server/instances/default_instance",
+      "-dump-digest",
+      "/path/to/tmp/",
+      "-paths",
+      "[CLEANUP]/results_tmp_1:results"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics to CAS",
+    "~followup_annotations": [
+      "@@@STEP_LINK@CAS UI@https://cas-viewer.appspot.com/projects/example-cas-server/instances/default_instance/blobs/e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855/0/tree@@@",
+      "@@@SET_BUILD_PROPERTY@results_cas_hash@\"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855/0\"@@@"
+    ]
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_test_drone.expected/experimental.json b/recipes/devicelab/devicelab_test_drone.expected/experimental.json
new file mode 100644
index 0000000..6a7d21e
--- /dev/null
+++ b/recipes/devicelab/devicelab_test_drone.expected/experimental.json
@@ -0,0 +1,1041 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info"
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[CLEANUP]/tmp_tmp_1/flutter sdk",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "2d72510e447ab60a9728aeea2362d8be2cbd7789"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "log",
+      "--pretty=format:%ct",
+      "-n",
+      "1"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "git commit time",
+    "timeout": 600.0
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "git rev-parse"
+  },
+  {
+    "cmd": [],
+    "name": "Initialize logs"
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[CLEANUP]/flutter_logs_dir"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Initialize logs.Ensure [CLEANUP]/flutter_logs_dir",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "",
+      "[CLEANUP]/flutter_logs_dir/noop.txt"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Initialize logs.Write noop file",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Dependencies"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
+      "--",
+      "RECIPE_REPO[depot_tools]/gsutil.py",
+      "----",
+      "cp",
+      "-r",
+      "gs://flutter_devicelab/flutter/2d72510e447ab60a9728aeea2362d8be2cbd7789/def",
+      "[CLEANUP]/tmp_tmp_2"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "gsutil download artifact"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
+    "cmd": [
+      "dart",
+      "pub",
+      "get"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "dart pub get"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor (2)",
+    "timeout": 300
+  },
+  {
+    "cmd": [
+      "dart",
+      "bin/test_runner.dart",
+      "test",
+      "-t",
+      "abc",
+      "--results-file",
+      "[CLEANUP]/results_tmp_1/results",
+      "--luci-builder",
+      "Linux abc",
+      "--task-args",
+      "test",
+      "--task-args",
+      "application-binary-path=[CLEANUP]/tmp_tmp_2/def",
+      "--git-branch",
+      "master"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "run abc",
+    "timeout": 1800,
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@test_stdout@#flaky@@@",
+      "@@@STEP_LOG_LINE@test_stdout@this is a flaky@@@",
+      "@@@STEP_LOG_LINE@test_stdout@flaky: true@@@",
+      "@@@STEP_LOG_END@test_stdout@@@",
+      "@@@STEP_LOG_LINE@test_stderr@@@@",
+      "@@@STEP_LOG_END@test_stderr@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "process logs"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
+      "--",
+      "RECIPE_REPO[depot_tools]/gsutil.py",
+      "-m",
+      "----",
+      "cp",
+      "-r",
+      "[CLEANUP]/flutter_logs_dir",
+      "gs://flutter_logs/flutter/2d72510e447ab60a9728aeea2362d8be2cbd7789/abc/00000000-0000-0000-0000-000000001337"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "process logs.gsutil upload logs 2d72510e447ab60a9728aeea2362d8be2cbd7789",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LINK@archive logs@https://console.cloud.google.com/storage/browser/flutter_logs/flutter/2d72510e447ab60a9728aeea2362d8be2cbd7789/abc/00000000-0000-0000-0000-000000001337@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[CLEANUP]/flutter_logs_dir",
+      "*"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "process logs.logs",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@glob@[CLEANUP]/flutter_logs_dir/a.txt@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "log links",
+    "~followup_annotations": [
+      "@@@STEP_LINK@myfile.txt@https://storage.googleapis.com/flutter_logs/flutter/2d72510e447ab60a9728aeea2362d8be2cbd7789/abc/00000000-0000-0000-0000-000000001337/myfile.txt@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "listdir",
+      "[CLEANUP]/flutter_logs_dir",
+      "--recursive"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "log links.List logs path",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@listdir@[CLEANUP]/flutter_logs_dir/myfile.txt@@@",
+      "@@@STEP_LOG_END@listdir@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Killing Processes"
+  },
+  {
+    "cmd": [
+      "pkill",
+      "chrome"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill chrome",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "dart"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill dart",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "flutter"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "java"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill java",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "adb"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill adb",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info (2)"
+  },
+  {
+    "cmd": [
+      "echo",
+      "test run is flaky"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "step is flaky: run abc"
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_test_drone.expected/local-engine.json b/recipes/devicelab/devicelab_test_drone.expected/local-engine.json
new file mode 100644
index 0000000..8f64669
--- /dev/null
+++ b/recipes/devicelab/devicelab_test_drone.expected/local-engine.json
@@ -0,0 +1,1440 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info"
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[CLEANUP]/tmp_tmp_1/flutter sdk",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "2d72510e447ab60a9728aeea2362d8be2cbd7789"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "log",
+      "--pretty=format:%ct",
+      "-n",
+      "1"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
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+        "hostname": "rdbhost"
+      }
+    },
+    "name": "log links.List logs path",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@listdir@[CLEANUP]/flutter_logs_dir/myfile.txt@@@",
+      "@@@STEP_LOG_END@listdir@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Killing Processes"
+  },
+  {
+    "cmd": [
+      "pkill",
+      "chrome"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill chrome",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "dart"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill dart",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "flutter"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "java"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill java",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "adb"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill adb",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info (2)"
+  },
+  {
+    "cmd": [],
+    "name": "Upload metrics"
+  },
+  {
+    "cmd": [
+      "luci-auth",
+      "token",
+      "-scopes",
+      "https://www.googleapis.com/auth/cloud-platform https://www.googleapis.com/auth/datastore",
+      "-lifetime",
+      "3m"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics.get access token for default account",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "extra.secret.token.should.not.be.logged",
+      "[CLEANUP]/tmp_tmp_3"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics.write metric center token",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "luci-auth",
+      "token",
+      "-lifetime",
+      "3m"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics.get access token for default account (2)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "extra.secret.token.should.not.be.logged",
+      "[CLEANUP]/tmp_tmp_4"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics.write cocoon token",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "dart",
+      "bin/test_runner.dart",
+      "upload-metrics",
+      "--test-flaky",
+      "False",
+      "--builder-bucket",
+      "ci",
+      "--git-branch",
+      "master",
+      "--luci-builder",
+      "Linux abc",
+      "--test-status",
+      "Succeeded",
+      "--service-account-token-file",
+      "[CLEANUP]/tmp_tmp_4"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GCP_PROJECT": "flutter-infra",
+      "GIT_BRANCH": "master",
+      "LOCAL_ENGINE": "[CLEANUP]/builder/src/out/host-release",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+      "TOKEN_PATH": "[CLEANUP]/tmp_tmp_3"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/builder/src/out/host-release/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "test:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics.upload results",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_test_drone.expected/no-artifact-name.json b/recipes/devicelab/devicelab_test_drone.expected/no-artifact-name.json
new file mode 100644
index 0000000..285b968
--- /dev/null
+++ b/recipes/devicelab/devicelab_test_drone.expected/no-artifact-name.json
@@ -0,0 +1,33 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "name": "OS info"
+  },
+  {
+    "cmd": [],
+    "name": "RECIPE CRASH (Uncaught exception)",
+    "~followup_annotations": [
+      "@@@STEP_EXCEPTION@@@",
+      "The recipe has crashed at point 'Uncaught exception'!",
+      "",
+      "Traceback (most recent call last):",
+      "  File \"RECIPE_REPO[flutter]/recipes/devicelab/devicelab_test_drone.py\", line 51, in RunSteps",
+      "    raise ValueError('An artifact property is required')",
+      "ValueError('An artifact property is required')"
+    ]
+  },
+  {
+    "failure": {
+      "humanReason": "Uncaught Exception: ValueError('An artifact property is required')"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_test_drone.expected/no-task-name.json b/recipes/devicelab/devicelab_test_drone.expected/no-task-name.json
new file mode 100644
index 0000000..c918fb5
--- /dev/null
+++ b/recipes/devicelab/devicelab_test_drone.expected/no-task-name.json
@@ -0,0 +1,33 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "name": "OS info"
+  },
+  {
+    "cmd": [],
+    "name": "RECIPE CRASH (Uncaught exception)",
+    "~followup_annotations": [
+      "@@@STEP_EXCEPTION@@@",
+      "The recipe has crashed at point 'Uncaught exception'!",
+      "",
+      "Traceback (most recent call last):",
+      "  File \"RECIPE_REPO[flutter]/recipes/devicelab/devicelab_test_drone.py\", line 46, in RunSteps",
+      "    raise ValueError('A task_name property is required')",
+      "ValueError('A task_name property is required')"
+    ]
+  },
+  {
+    "failure": {
+      "humanReason": "Uncaught Exception: ValueError('A task_name property is required')"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_test_drone.expected/no-upload-metrics-linux-staging.json b/recipes/devicelab/devicelab_test_drone.expected/no-upload-metrics-linux-staging.json
new file mode 100644
index 0000000..29c136c
--- /dev/null
+++ b/recipes/devicelab/devicelab_test_drone.expected/no-upload-metrics-linux-staging.json
@@ -0,0 +1,1213 @@
+[
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info"
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[CLEANUP]/tmp_tmp_1/flutter sdk",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "2d72510e447ab60a9728aeea2362d8be2cbd7789"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "log",
+      "--pretty=format:%ct",
+      "-n",
+      "1"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "git commit time",
+    "timeout": 600.0
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "git rev-parse"
+  },
+  {
+    "cmd": [],
+    "name": "Initialize logs"
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[CLEANUP]/flutter_logs_dir"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Initialize logs.Ensure [CLEANUP]/flutter_logs_dir",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "",
+      "[CLEANUP]/flutter_logs_dir/noop.txt"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Initialize logs.Write noop file",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Dependencies"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
+      "--",
+      "RECIPE_REPO[depot_tools]/gsutil.py",
+      "----",
+      "cp",
+      "-r",
+      "gs://flutter_devicelab/flutter/2d72510e447ab60a9728aeea2362d8be2cbd7789/def",
+      "[CLEANUP]/tmp_tmp_2"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "gsutil download artifact"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor",
+    "timeout": 300
+  },
+  {
+    "cmd": [
+      "dart",
+      "pub",
+      "get"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "dart pub get"
+  },
+  {
+    "cmd": [
+      "flutter",
+      "doctor",
+      "--verbose"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "flutter doctor (2)",
+    "timeout": 300
+  },
+  {
+    "cmd": [
+      "dart",
+      "bin/test_runner.dart",
+      "test",
+      "-t",
+      "abc",
+      "--results-file",
+      "[CLEANUP]/results_tmp_1/results",
+      "--luci-builder",
+      "Linux abc",
+      "--task-args",
+      "test",
+      "--task-args",
+      "application-binary-path=[CLEANUP]/tmp_tmp_2/def",
+      "--git-branch",
+      "master"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "run abc",
+    "timeout": 1800,
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@test_stdout@@@@",
+      "@@@STEP_LOG_END@test_stdout@@@",
+      "@@@STEP_LOG_LINE@test_stderr@@@@",
+      "@@@STEP_LOG_END@test_stderr@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "process logs"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::gsutil]/resources/gsutil_smart_retry.py",
+      "--",
+      "RECIPE_REPO[depot_tools]/gsutil.py",
+      "-m",
+      "----",
+      "cp",
+      "-r",
+      "[CLEANUP]/flutter_logs_dir",
+      "gs://flutter_logs/flutter/2d72510e447ab60a9728aeea2362d8be2cbd7789/abc/00000000-0000-0000-0000-000000001337"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "process logs.gsutil upload logs 2d72510e447ab60a9728aeea2362d8be2cbd7789",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LINK@archive logs@https://console.cloud.google.com/storage/browser/flutter_logs/flutter/2d72510e447ab60a9728aeea2362d8be2cbd7789/abc/00000000-0000-0000-0000-000000001337@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "glob",
+      "[CLEANUP]/flutter_logs_dir",
+      "*"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "process logs.logs",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@glob@[CLEANUP]/flutter_logs_dir/a.txt@@@",
+      "@@@STEP_LOG_END@glob@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "log links",
+    "~followup_annotations": [
+      "@@@STEP_LINK@myfile.txt@https://storage.googleapis.com/flutter_logs/flutter/2d72510e447ab60a9728aeea2362d8be2cbd7789/abc/00000000-0000-0000-0000-000000001337/myfile.txt@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "listdir",
+      "[CLEANUP]/flutter_logs_dir",
+      "--recursive"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "log links.List logs path",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@listdir@[CLEANUP]/flutter_logs_dir/myfile.txt@@@",
+      "@@@STEP_LOG_END@listdir@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Killing Processes"
+  },
+  {
+    "cmd": [
+      "pkill",
+      "chrome"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill chrome",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "dart"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill dart",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "flutter"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill flutter",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "java"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill java",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "pkill",
+      "adb"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Killing Processes.kill adb",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "top",
+      "-b",
+      "-n",
+      "3",
+      "-o",
+      "%MEM"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "OS info (2)"
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "RECIPE_MODULE[recipe_engine::cas]/resources/infra.sha1",
+      "/path/to/tmp/"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "read infra revision",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@infra.sha1@git_revision:mock_infra_git_revision@@@",
+      "@@@STEP_LOG_END@infra.sha1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "install infra/tools/luci/cas"
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/cipd_tool/infra/tools/luci/cas/git_revision%3Amock_infra_git_revision"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "install infra/tools/luci/cas.ensure package directory",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[START_DIR]/cipd_tool/infra/tools/luci/cas/git_revision%3Amock_infra_git_revision",
+      "-ensure-file",
+      "infra/tools/luci/cas/${platform} git_revision:mock_infra_git_revision",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "install infra/tools/luci/cas.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:moc\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/luci/cas/resolved-platform\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "[START_DIR]/cipd_tool/infra/tools/luci/cas/git_revision%3Amock_infra_git_revision/cas",
+      "archive",
+      "-cas-instance",
+      "projects/example-cas-server/instances/default_instance",
+      "-dump-digest",
+      "/path/to/tmp/",
+      "-paths",
+      "[CLEANUP]/results_tmp_1:results"
+    ],
+    "cwd": "[CLEANUP]/tmp_tmp_1/flutter sdk/dev/devicelab",
+    "env": {
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
+      "GIT_BRANCH": "master",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "OS": "linux",
+      "PUB_CACHE": "[START_DIR]/.pub-cache",
+      "REVISION": "",
+      "SDK_CHECKOUT_PATH": "[CLEANUP]/tmp_tmp_1/flutter sdk"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin",
+        "[CLEANUP]/tmp_tmp_1/flutter sdk/bin/cache/dart-sdk/bin"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:staging"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Upload metrics to CAS",
+    "~followup_annotations": [
+      "@@@STEP_LINK@CAS UI@https://cas-viewer.appspot.com/projects/example-cas-server/instances/default_instance/blobs/e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855/0/tree@@@",
+      "@@@SET_BUILD_PROPERTY@results_cas_hash@\"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855/0\"@@@"
+    ]
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/devicelab/devicelab_test_drone.py b/recipes/devicelab/devicelab_test_drone.py
new file mode 100644
index 0000000..addff8b
--- /dev/null
+++ b/recipes/devicelab/devicelab_test_drone.py
@@ -0,0 +1,355 @@
+# Copyright 2020 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from recipe_engine.recipe_api import Property
+
+PYTHON_VERSION_COMPATIBILITY = 'PY3'
+
+DEPS = [
+    'depot_tools/gsutil',
+    'flutter/devicelab_osx_sdk',
+    'flutter/flutter_deps',
+    'flutter/logs_util',
+    'flutter/os_utils',
+    'flutter/osx_sdk',
+    'flutter/repo_util',
+    'flutter/retry',
+    'flutter/test_utils',
+    'flutter/token_util',
+    'fuchsia/git',
+    'recipe_engine/buildbucket',
+    'recipe_engine/cas',
+    'recipe_engine/context',
+    'recipe_engine/json',
+    'recipe_engine/path',
+    'recipe_engine/platform',
+    'recipe_engine/properties',
+    'recipe_engine/raw_io',
+    'recipe_engine/runtime',
+    'recipe_engine/step',
+    'recipe_engine/swarming',
+]
+
+# Fifteen minutes
+MAX_TIMEOUT_SECS = 30 * 60
+# GCS bucket for flutter devicelab build app artifacts.
+DEVICELAB_BUCKET = 'flutter_devicelab'
+
+
+def RunSteps(api):
+  # Collect memory/cpu/process before task execution.
+  api.os_utils.collect_os_info()
+  api.os_utils.print_pub_certs()
+  task_name = api.properties.get("task_name")
+  if not task_name:
+    raise ValueError('A task_name property is required')
+
+  # Artifact needs pre-built before running the test.
+  artifact = api.properties.get('artifact', None)
+  if not artifact:
+    raise ValueError('An artifact property is required')
+
+  flutter_path = api.path.mkdtemp().join('flutter sdk')
+  api.repo_util.checkout(
+      'flutter',
+      flutter_path,
+      api.properties.get('git_url'),
+      api.properties.get('git_ref'),
+  )
+  with api.context(cwd=flutter_path):
+    commit_time = api.git(
+        'git commit time',
+        'log',
+        '--pretty=format:%ct',
+        '-n',
+        '1',
+        stdout=api.raw_io.output_text()
+    ).stdout.rstrip()
+  env, env_prefixes = api.repo_util.flutter_environment(flutter_path)
+  api.logs_util.initialize_logs_collection(env)
+  with api.step.nest('Dependencies'):
+    api.flutter_deps.flutter_engine(env, env_prefixes)
+    deps = api.properties.get('dependencies', [])
+    # TODO: If deps contains dart_sdk and we are running a local engine,
+    # we don't want to fetch it with cipd, so don't fetch it with required_deps
+    api.flutter_deps.required_deps(env, env_prefixes, deps)
+
+  target_tags = api.properties.get('tags', [])
+  device_tags = api.test_utils.collect_benchmark_tags(
+      env, env_prefixes, target_tags
+  )
+  benchmark_tags = api.json.dumps(device_tags)
+
+  devicelab_path = flutter_path.join('dev', 'devicelab')
+  git_branch = api.properties.get('git_branch')
+  # Create tmp file to store results in
+  results_path = api.path.mkdtemp(prefix='results').join('results')
+  # Run test
+  runner_params = [
+      '-t', task_name, '--results-file', results_path, '--luci-builder',
+      api.properties.get('buildername')
+  ]
+  # Downloads artifact
+  artifact_destination_dir = api.path.mkdtemp()
+  download_artifact(api, artifact, artifact_destination_dir)
+  # Test taskArgs
+  artifact_path = artifact_destination_dir.join(artifact)
+  runner_params.extend([
+      '--task-args', 'test', '--task-args',
+      'application-binary-path=%s' % artifact_path
+  ])
+  if 'LOCAL_ENGINE' in env:
+    runner_params.extend(['--local-engine', env['LOCAL_ENGINE']])
+  # LUCI git checkouts end up in a detached HEAD state, so branch must
+  # be passed from gitiles -> test runner -> Cocoon.
+  if git_branch and api.properties.get('git_url') is None:
+    # git_branch is set only when the build was triggered on post-submit.
+    runner_params.extend(['--git-branch', git_branch])
+  test_status = ''
+  with api.context(env=env, env_prefixes=env_prefixes, cwd=devicelab_path):
+    api.repo_util.run_flutter_doctor()
+    api.step('dart pub get', ['dart', 'pub', 'get'], infra_step=True)
+    dep_list = {d['dependency']: d.get('version') for d in deps}
+    if 'xcode' not in dep_list:
+      with api.context(env=env, env_prefixes=env_prefixes):
+        api.repo_util.run_flutter_doctor()
+        test_runner_command = ['dart', 'bin/test_runner.dart', 'test']
+        test_runner_command.extend(runner_params)
+        try:
+          test_status = api.test_utils.run_test(
+              'run %s' % task_name,
+              test_runner_command,
+              timeout_secs=MAX_TIMEOUT_SECS
+          )
+        finally:
+          debug_after_failure(api, task_name)
+        if test_status == 'flaky':
+          api.test_utils.flaky_step('run %s' % task_name)
+  with api.context(env=env, env_prefixes=env_prefixes, cwd=devicelab_path):
+    uploadResults(
+        api, env, env_prefixes, results_path, test_status == 'flaky',
+        git_branch, api.properties.get('buildername'), commit_time, task_name,
+        benchmark_tags
+    )
+    uploadMetricsToCas(api, results_path)
+
+
+def download_artifact(api, artifact, artifact_destination_dir):
+  '''Download pre-build artifact.'''
+  commit_sha = api.repo_util.get_env_commit()
+  artifact_gcs_dir = 'flutter/%s' % commit_sha
+  artifact_gcs_path = '%s/%s' % (artifact_gcs_dir, artifact)
+  api.gsutil.download(
+      DEVICELAB_BUCKET,
+      artifact_gcs_path,
+      artifact_destination_dir,
+      args=['-r'],
+      name="download artifact"
+  )
+
+
+def debug_after_failure(api, task_name):
+  """Upload logs and collect OS debug info."""
+  api.logs_util.upload_logs(task_name)
+  # This is to clean up leaked processes.
+  api.os_utils.kill_processes()
+  # Collect memory/cpu/process after task execution.
+  api.os_utils.collect_os_info()
+
+
+def shouldNotUpdate(api, git_branch):
+  """Check if a post submit builder should update results to cocoon/skia perf.
+
+  Test results will be sent to cocoon/skia perf only when test is post-submit and test is from
+  supported branches.
+  """
+  supported_branches = ['master']
+  if api.runtime.is_experimental or api.properties.get(
+      'git_url') or git_branch not in supported_branches:
+    return True
+  else:
+    return False
+
+
+def uploadResults(
+    api,
+    env,
+    env_prefixes,
+    results_path,
+    is_test_flaky,
+    git_branch,
+    builder_name,
+    commit_time,
+    task_name,
+    benchmark_tags,
+    test_status='Succeeded',
+):
+  """Upload DeviceLab test results to Cocoon/skia perf.
+
+  luci-auth only gurantees a service account token life of 3 minutes. To work
+  around this limitation, results uploading is separate from the the test run.
+
+  Only post-submit tests upload results to Cocoon/skia perf.
+
+  If `upload_metrics: true`, generated test metrics will be uploaded to skia perf
+  for both prod and staging tests.
+
+  Otherwise, test status will be updated in Cocoon for tests running in prod pool,
+  and staging tests without `upload_metrics: true` will not be updated.
+
+  Args:
+    env(dict): Current environment variables.
+    env_prefixes(dict):  Current environment prefixes variables.
+    results_path(str): Path to test results.
+    is_test_flaky(bool): Flaky flag for the test running step.
+    git_branch(str): Branch the test runs against.
+    builder_name(str): The builder name that is being run on.
+    commit_time(str): The commit time in UNIX timestamp.
+    task_name(str): The task name of the current test.
+    benchmark_tags(str): Json dumped str of benchmark tags, which includes host and device info.
+    test_status(str): The status of the test running step.
+  """
+  if shouldNotUpdate(api, git_branch):
+    return
+  bucket = api.buildbucket.build.builder.bucket
+  runner_params = ['--test-flaky', is_test_flaky, '--builder-bucket', bucket]
+  if api.properties.get('upload_metrics'):
+    runner_params.extend([
+        '--results-file', results_path, '--commit-time', commit_time,
+        '--task-name', task_name, '--benchmark-tags', benchmark_tags
+    ])
+  else:
+    # For builders without `upload_metrics: true`
+    #  - prod ones need to update test status, to be reflected on go/flutter-build
+    #  - staging ones do not need to as we are not tracking staging tests in cocoon datastore.
+    if bucket == 'staging':
+      return
+    else:
+      runner_params.extend([
+          '--git-branch', git_branch, '--luci-builder', builder_name,
+          '--test-status', test_status
+      ])
+
+  with api.step.nest('Upload metrics'):
+    env['TOKEN_PATH'] = api.token_util.metric_center_token()
+    env['GCP_PROJECT'] = 'flutter-infra'
+    runner_params.extend([
+        '--service-account-token-file',
+        api.token_util.cocoon_token()
+    ])
+    upload_command = ['dart', 'bin/test_runner.dart', 'upload-metrics']
+    upload_command.extend(runner_params)
+    with api.context(env=env, env_prefixes=env_prefixes):
+      api.step('upload results', upload_command, infra_step=True)
+
+
+def uploadMetricsToCas(api, results_path):
+  """Upload DeviceLab test performance metrics to CAS.
+
+  The hash of the CAS (content-addressed storage) upload is added as an
+  output property to the build.
+  """
+  if not api.properties.get('upload_metrics_to_cas'):
+    return
+  cas_hash = api.cas.archive(
+      'Upload metrics to CAS', api.path.dirname(results_path), results_path
+  )
+  api.step.active_result.presentation.properties['results_cas_hash'] = cas_hash
+
+
+def GenTests(api):
+  checkout_path = api.path['cleanup'].join('tmp_tmp_1', 'flutter sdk')
+  yield api.test(
+      "no-task-name",
+      api.expect_exception('ValueError'),
+  )
+  yield api.test(
+      "no-artifact-name",
+      api.properties(
+          buildername='Linux abc', task_name='abc', git_ref='refs/pull/1/head'
+      ),
+      api.expect_exception('ValueError'),
+  )
+  yield api.test(
+      "artifact-exists",
+      api.properties(
+          buildername='Linux abc',
+          task_name='abc',
+          git_branch='master',
+          artifact='def',
+          git_ref='refs/pull/1/head'
+      ),
+      api.repo_util.flutter_environment_data(checkout_dir=checkout_path),
+  )
+  yield api.test(
+      "basic",
+      api.properties(
+          buildername='Linux abc',
+          task_name='abc',
+          git_branch='master',
+          artifact='def',
+          upload_metrics=True,
+          upload_metrics_to_cas=True
+      ),
+      api.repo_util.flutter_environment_data(checkout_dir=checkout_path),
+      api.step_data(
+          'run abc',
+          stdout=api.raw_io.output_text('#flaky\nthis is a flaky\nflaky: true'),
+          retcode=0
+      ),
+      api.buildbucket.ci_build(
+          project='test',
+          git_repo='git.example.com/test/repo',
+      ),
+  )
+  yield api.test(
+      "experimental",
+      api.properties(
+          buildername='Linux abc',
+          task_name='abc',
+          git_branch='master',
+          artifact='def'
+      ),
+      api.repo_util.flutter_environment_data(checkout_dir=checkout_path),
+      api.step_data(
+          'run abc',
+          stdout=api.raw_io.output_text('#flaky\nthis is a flaky\nflaky: true'),
+          retcode=0
+      ),
+      api.buildbucket.ci_build(
+          project='test',
+          git_repo='git.example.com/test/repo',
+      ),
+      api.runtime(is_experimental=True),
+  )
+  yield api.test(
+      "no-upload-metrics-linux-staging",
+      api.properties(
+          buildername='Linux abc',
+          task_name='abc',
+          artifact='def',
+          upload_metrics_to_cas=True,
+          git_branch='master',
+      ), api.repo_util.flutter_environment_data(checkout_dir=checkout_path),
+      api.buildbucket.ci_build(
+          git_ref='refs/heads/master',
+          bucket='staging',
+      )
+  )
+  yield api.test(
+      "local-engine",
+      api.properties(
+          buildername='Linux abc',
+          task_name='abc',
+          local_engine_cas_hash='isolatehashlocalengine/22',
+          local_engine='host-release',
+          git_branch='master',
+          artifact='def',
+      ), api.repo_util.flutter_environment_data(checkout_dir=checkout_path),
+      api.buildbucket.ci_build(
+          project='test',
+          git_repo='git.example.com/test/repo',
+          git_ref='refs/heads/master',
+      )
+  )