Fatal error: Uncaught Error: Class "MediaWiki\Extension\DiscussionTools\Tests\IntegrationTestCase" not found in /var/www/html/extensions/DiscussionTools/tests/phpunit/ServiceWiringTest.php:18 Stack trace: #0 {main} thrown in /var/www/html/extensions/DiscussionTools/tests/phpunit/ServiceWiringTest.php on line 18