It gives me this error instead of running the tests:
A database error has occurred. Did you forget to run maintenance/update.php after upgrading? See: https://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script
Query: DELETE FROM l10n_cache WHERE lc_lang = 'en'
Function: LCStore_DB::startWrite
Error: 14 unable to open database file
Version: unspecified
Severity: normal