Fatal error: Uncaught Error: Class "MediaWiki\Tests\Maintenance\DumpTestCase" not found in /var/www/html/orian-wiki/tests/phpunit/maintenance/BackupDumperPageTest.php:21 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/tests/phpunit/maintenance/BackupDumperPageTest.php on line 21