Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/flighto/e-commerce/vendor/payum/payum-bundle/Tests/PayumBundleTest.php:7 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/payum/payum-bundle/Tests/PayumBundleTest.php on line 7