Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/flighto/e-commerce/vendor/sylius/fixtures-bundle/tests/DependencyInjection/ConfigurationTest.php:21 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/sylius/fixtures-bundle/tests/DependencyInjection/ConfigurationTest.php on line 21