Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /users/energydata/www/volkszaehler.org/vendor/ringcentral/psr7/tests/StreamTest.php:10 Stack trace: #0 {main} thrown in /users/energydata/www/volkszaehler.org/vendor/ringcentral/psr7/tests/StreamTest.php on line 10