Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /users/forscher/www/Baikal/vendor/sabre/http/tests/HTTP/SapiTest.php:7 Stack trace: #0 {main} thrown in /users/forscher/www/Baikal/vendor/sabre/http/tests/HTTP/SapiTest.php on line 7