Fatal error: Uncaught Error: Class "MediaWiki\Extension\DiscussionTools\Tests\IntegrationTestCase" not found in C:\xampp\htdocs\extensions\DiscussionTools\tests\phpunit\ContentThreadItemTest.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\DiscussionTools\tests\phpunit\ContentThreadItemTest.php on line 20