Fatal error: Uncaught Error: Class "MediaWiki\Tests\Specials\SpecialPageTestBase" not found in /var/www/html/w/tests/phpunit/includes/Specials/SpecialPageDataTest.php:18 Stack trace: #0 {main} thrown in /var/www/html/w/tests/phpunit/includes/Specials/SpecialPageDataTest.php on line 18