Fatal error: Uncaught Error: Class "MediaWikiUnitTestCase" not found in C:\xampp\htdocs\extensions\VisualEditor\tests\phpunit\unit\VisualEditorHookRunnerTest.php:14 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\VisualEditor\tests\phpunit\unit\VisualEditorHookRunnerTest.php on line 14