Fatal error: Uncaught Error: Class "Tests\TestCase" not found in /home/roltechszq/addax/addax/vendor/php-mqtt/client/tests/Feature/MessageReceivedEventHandlerTest.php:17 Stack trace: #0 {main} thrown in /home/roltechszq/addax/addax/vendor/php-mqtt/client/tests/Feature/MessageReceivedEventHandlerTest.php on line 17