Fatal error: Uncaught Error: Class "MediaWiki\Tests\Maintenance\MaintenanceBaseTestCase" not found in C:\xampp\htdocs\extensions\CheckUser\tests\phpunit\integration\maintenance\PurgeOldDataTest.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\CheckUser\tests\phpunit\integration\maintenance\PurgeOldDataTest.php on line 24