Fatal error: Uncaught Error: Class "MediaWikiUnitTestCase" not found in /var/www/html/extensions/MobileFrontend/tests/phpunit/unit/devices/CustomHeaderDeviceDetectorTest.php:12 Stack trace: #0 {main} thrown in /var/www/html/extensions/MobileFrontend/tests/phpunit/unit/devices/CustomHeaderDeviceDetectorTest.php on line 12