The script is only measuring `packages/flutter` test coverage, but that report is commenting on PRs with no changes to `packages/flutter` https://github.com/flutter/flutter/blob/bd4376ca0ad5b46c42b374a0db007f82c0879426/.github/workflows/coverage.yml#L24 For example, my `packages/flutter_tools` PR reported there was no coverage change. https://github.com/flutter/flutter/pull/113585#issuecomment-1281670730 https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#example-including-paths