A) General Verify that complete PHPUnit runs are passing (GHA, ToBiC...) for all branches. B) Testing instructions for MOODLE_311_STABLE and master Install local_codechecker in the site. Run this (see the important note below about the HEAD alternatives and commits): git show --pretty="" --name-only HEAD | \ xargs local/codechecker/phpcs/bin/phpcs --standard=moodle --extensions=php \ --sniffs=moodle.PHPUnit.TestCaseNames -p && echo "Yay" Verify that you get 87 (for master) and 86 (for 311_STABLE) dots in the output, without any error and with "Yay" printed at the end. Init phpunit: php admin/tool/phpunit/cli/init.php Run this (see the important note below about the HEAD alternatives and commits): git show --pretty="" --name-only HEAD | \ xargs -n 1 -I {} bash -c "echo {}; vendor/bin/phpunit {} > /dev/null || echo ERROR" Verify that you don't get any "ERROR" output, that means that all the tests modified can be run individually. Run this (see the important note below about the HEAD alternatives and commits): git show --pretty="" --name-only HEAD | \ grep -v '/tests/.*_test.php' Verify that no files are returned. That means that we only have modified _test.php files within tests/ directories. Important Note : the HEAD in the above commands assumes that the branches have been integrated without any merge commit. You may need to replace them by the real commits if the issue has been integrated with merge commit. Here there are the commit details: 311_STABLE: HEAD = eb0c520ad6a4ee7b8f78bbae3a130f782f2d198b master: HEAD = 4003e31983e7ddc3e4c75aba3b1e0d6fb7d8a28b