Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in /var/www/html/w/tests/phpunit/includes/libs/ObjectCache/MultiWriteBagOStuffTest.php:13 Stack trace: #0 {main} thrown in /var/www/html/w/tests/phpunit/includes/libs/ObjectCache/MultiWriteBagOStuffTest.php on line 13