Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\snipe-it\vendor\slevomat\coding-standard\SlevomatCodingStandard\Sniffs\TestCase.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\snipe-it\vendor\slevomat\coding-standard\SlevomatCodingStandard\Sniffs\TestCase.php on line 30