Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in /var/www/html/w/tests/phpunit/integration/includes/Notification/MiddlewareChainTest.php:23 Stack trace: #0 {main} thrown in /var/www/html/w/tests/phpunit/integration/includes/Notification/MiddlewareChainTest.php on line 23