Fatal error: Uncaught Error: Class "MediaWikiUnitTestCase" not found in C:\xampp\htdocs\extensions\CheckUser\tests\phpunit\unit\ToolLinksMessagesTest.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\CheckUser\tests\phpunit\unit\ToolLinksMessagesTest.php on line 16