Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/wittyly/public_html/staging/hr-witty/vendor/cbschuld/browser.php/tests/FirefoxTest.php:8 Stack trace: #0 {main} thrown in /home/wittyly/public_html/staging/hr-witty/vendor/cbschuld/browser.php/tests/FirefoxTest.php on line 8