Fatal error: Uncaught Error: Class "Tests\TestCase" not found in /home/roltechszq/addax/addax/vendor/php-mqtt/client/tests/Feature/SupportedProtocolsTest.php:18 Stack trace: #0 {main} thrown in /home/roltechszq/addax/addax/vendor/php-mqtt/client/tests/Feature/SupportedProtocolsTest.php on line 18