Testing is covered by specific new unit tests. A full run of the Moodle PHPUnit test suite should be required to exclude regressions - they should be DB independent. You can use the Moodle Docker Toolbox to execute them. Prepare the "local" test environment Code changes are DB invariant: # export MOODLE_DOCKER_WWWROOT=/path/to/moodle/branch # export MOODLE_DOCKER_DB=mysql # cp config.docker-template.php $MOODLE_DOCKER_WWWROOT/config.php # bin/moodle-docker-compose up -d # bin/moodle-docker-wait-for-db Launch the specific tests No error should be reported like in the run below: # bin/moodle-docker-compose exec webserver php admin/tool/phpunit/cli/init.php # bin/moodle-docker-compose exec webserver php vendor/bin/phpunit --filter weblib_test Moodle 4.2dev (Build: 20221128), a0038c48ee9ea313d00153a9269ba849914befbe Php: 7.4.32, mysqli: 5.7.40, OS: Linux 3.10.0-1160.80.1.el7.x86_64 x86_64 PHPUnit 9.5.25 #StandWithUkraine   ................................................................. 65 / 87 ( 74%) ...................... 87 / 87 (100%)   Time: 00:02.924, Memory: 304.00 MB   OK (87 tests, 293 assertions) # bin/moodle-docker-compose exec webserver php vendor/bin/phpunit --filter outputrequirementslib_test Moodle 4.2dev (Build: 20221128), a0038c48ee9ea313d00153a9269ba849914befbe Php: 7.4.32, mysqli: 5.7.40, OS: Linux 3.10.0-1160.80.1.el7.x86_64 x86_64 PHPUnit 9.5.25 #StandWithUkraine   ................................. 33 / 33 (100%)   Time: 00:01.835, Memory: 302.00 MB   OK (33 tests, 49 assertions) Dispose the test environment # bin/moodle-docker-compose down -v