Fatal error: Uncaught Error: Class 'MediaWikiUnitTestCase' not found in /var/www/html/wiki_2023/extensions/Gadgets/tests/phpunit/unit/GadgetTest.php:8 Stack trace: #0 {main} thrown in /var/www/html/wiki_2023/extensions/Gadgets/tests/phpunit/unit/GadgetTest.php on line 8