Fatal error: Uncaught Error: Class "MediaWikiLangTestCase" not found in /var/www/html/extensions/MobileFrontend/tests/phpunit/integration/MobileFrontendSkinHooksTest.php:7 Stack trace: #0 {main} thrown in /var/www/html/extensions/MobileFrontend/tests/phpunit/integration/MobileFrontendSkinHooksTest.php on line 7