Finally, and if you are using a Drupal core version that comes with PHPUnit 10 or above (this would be Drupal 11 or above), you can also set the flag `--fail-on-deprecation` in the `_PHPUNIT_EXTRA` variable. This is only needed if you are running the tests in non-concurrent mode (see above). The code would look like this:
printf" \n2️⃣ Running tests changed in this merge request\n\nThe following test files have been changed, and only these tests will be run:\n$TESTS_CHANGED\n "