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