Propagate `includeParentEnvironment` (#41)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 038bb4b..f19e210 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log for `process_runner`
 
+## 4.2.3
+
+- Propagate `includeParentEnvironment` to process manager (fixes
+  [#36](https://github.com/google/process_runner/issues/36))
+
 ## 4.2.2
 
 - Refactoring the main `run` method in `ProcessRunner` into smaller, more
diff --git a/pubspec.yaml b/pubspec.yaml
index 02f0f49..b965008 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@
 
 name: process_runner
 description: A process invocation abstraction for Dart that manages a multi-process queue.
-version: 4.2.2
+version: 4.2.3
 repository: https://github.com/google/process_runner
 issue_tracker: https://github.com/google/process_runner/issues
 documentation: https://github.com/google/process_runner/blob/master/process_runner/README.md
diff --git a/test/src/process_runner_test.dart b/test/src/process_runner_test.dart
index ef7c50f..e74c88a 100644
--- a/test/src/process_runner_test.dart
+++ b/test/src/process_runner_test.dart
@@ -119,6 +119,28 @@
       fakeProcessManager.verifyCalls(calls.keys);
     });
 
+    test('runProcess passes includeParentEnvironment to manager', () async {
+      processRunner = ProcessRunner(
+        processManager: fakeProcessManager,
+        defaultWorkingDirectory: Directory(testPath),
+        includeParentEnvironment: false,
+      );
+      final calls = <FakeInvocationRecord, List<ProcessResult>>{
+        FakeInvocationRecord(
+          <String>['command', 'arg1', 'arg2'],
+          workingDirectory: testPath,
+          includeParentEnvironment: false,
+        ): <ProcessResult>[
+          ProcessResult(0, 0, 'output1', ''),
+        ],
+      };
+      fakeProcessManager.fakeResults = calls;
+      await processRunner.runProcess(
+        <String>['command', 'arg1', 'arg2'],
+      );
+      fakeProcessManager.verifyCalls(calls.keys);
+    });
+
     test('runProcess throws when process manager throws', () async {
       fakeProcessManager.commandsThrow = true;
       final calls = <FakeInvocationRecord, List<ProcessResult>>{