Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in /var/www/html/orian-wiki/tests/phpunit/includes/session/PHPSessionHandlerTest.php:16 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/tests/phpunit/includes/session/PHPSessionHandlerTest.php on line 16