Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in C:\xampp\htdocs\extensions\CheckUser\tests\phpunit\integration\Services\CheckUserLookupUtilsTest.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\CheckUser\tests\phpunit\integration\Services\CheckUserLookupUtilsTest.php on line 20