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