Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/flighto/e-commerce/vendor/sylius-labs/polyfill-symfony-framework-bundle/tests/Command/ContainerAwareCommandTest.php:20 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/sylius-labs/polyfill-symfony-framework-bundle/tests/Command/ContainerAwareCommandTest.php on line 20