Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in C:\xampp\htdocs\extensions\CheckUser\tests\phpunit\integration\HookHandler\SidebarLinksHandlerTest.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\CheckUser\tests\phpunit\integration\HookHandler\SidebarLinksHandlerTest.php on line 23