Fatal error: Uncaught Error: Class "MediaWiki\PoolCounter\PoolCounter" not found in /var/www/html/w/tests/phpunit/mocks/PoolCounter/MockPoolCounterFailing.php:15 Stack trace: #0 {main} thrown in /var/www/html/w/tests/phpunit/mocks/PoolCounter/MockPoolCounterFailing.php on line 15