Fatal error: Uncaught Error: Class "MediaWiki\Extension\DiscussionTools\Tests\IntegrationTestCase" not found in C:\xampp\htdocs\extensions\DiscussionTools\tests\phpunit\LanguageDataTest.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\DiscussionTools\tests\phpunit\LanguageDataTest.php on line 11