Fatal error: Uncaught Error: Class "PhpSpec\ObjectBehavior" not found in /home/flighto/e-commerce/vendor/sylius/fixtures-bundle/spec/Suite/PriorityQueueSpec.php:19 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/sylius/fixtures-bundle/spec/Suite/PriorityQueueSpec.php on line 19