Currently, we run the PHPUnit test suite using the SQLite backend using Jenkins upon committing code into core.
However, Wikimedias's setup relies on MySQL and MySQL is also MediaWiki's suggested DBMS.
Hence, it would be great to have Jenkins additionally run the PHPUnit test suite using the MySQL backend.
P.S.: A similar bug is said to exist in bugzilla—however, I could not find such a bug.