Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/ashk_automation/ashk_integration/vendor/guzzlehttp/guzzle/tests/Exception/RequestExceptionTest.php:18 Stack trace: #0 {main} thrown in /var/www/html/ashk_automation/ashk_integration/vendor/guzzlehttp/guzzle/tests/Exception/RequestExceptionTest.php on line 18