This tool checks out https://github.com/flutter/tests at the commit SHA specified in tests.version, and runs the tests registered to verify that end-user apps and libraries are working at the current tip-of-tree of Flutter.
To (locally) test a specific SHA, use ci.dart:
cd dev/customer_testing dart ci.dart [sha]
To run a subset of the registry, pass --include=<glob> or --exclude=<glob>, matched against the registry/*.test file names:
dart ci.dart --include=flutter_devtools*.test
Or, to update the SHA for our CI, edit and send a PR for tests.version.