Fatal error: Uncaught Error: Class 'Tests\TestCase' not found in C:\xampp\htdocs\kelola-alkes\vendor\php-mqtt\client\tests\Feature\ConnectWithInvalidHostAndPortTest.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\kelola-alkes\vendor\php-mqtt\client\tests\Feature\ConnectWithInvalidHostAndPortTest.php on line 18