Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/Xereah/public_html/pstruzik/vendor/api-platform/core/src/GraphQl/Tests/Action/GraphQlPlaygroundActionTest.php:29 Stack trace: #0 {main} thrown in /home/Xereah/public_html/pstruzik/vendor/api-platform/core/src/GraphQl/Tests/Action/GraphQlPlaygroundActionTest.php on line 29