Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /users/maximus/www/storage/vendor/guzzlehttp/ringphp/tests/Client/MockHandlerTest.php:8 Stack trace: #0 {main} thrown in /users/maximus/www/storage/vendor/guzzlehttp/ringphp/tests/Client/MockHandlerTest.php on line 8