Fatal error: Uncaught Error: Class "MediaWiki\Tests\ResourceLoader\ResourceLoaderTestCase" not found in /var/www/html/w/tests/phpunit/includes/ResourceLoader/SkinModuleTest.php:19 Stack trace: #0 {main} thrown in /var/www/html/w/tests/phpunit/includes/ResourceLoader/SkinModuleTest.php on line 19