Fatal error: Uncaught Error: Class "MediaWiki\Tests\Structure\BundleSizeTestBase" not found in C:\xampp\htdocs\extensions\CheckUser\tests\phpunit\structure\BundleSizeTest.php:5 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\CheckUser\tests\phpunit\structure\BundleSizeTest.php on line 5