Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/bucerea/storage/vendor/guzzlehttp/ringphp/tests/Future/CompletedFutureValueTest.php:7 Stack trace: #0 {main} thrown in /home/bucerea/storage/vendor/guzzlehttp/ringphp/tests/Future/CompletedFutureValueTest.php on line 7