Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\xampp\htdocs\pimcore\my-project\vendor\cbschuld\browser.php\tests\FirefoxTest.php:8 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\cbschuld\browser.php\tests\FirefoxTest.php on line 8