Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/szperaczxf/storage_diagnostik/vendor/guzzlehttp/streams/tests/AsyncReadStreamTest.php:9 Stack trace: #0 {main} thrown in /home/szperaczxf/storage_diagnostik/vendor/guzzlehttp/streams/tests/AsyncReadStreamTest.php on line 9