Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\snipe-it\vendor\osa-eg\laravel-teams-notification\tests\TeamsNotificationTest.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\snipe-it\vendor\osa-eg\laravel-teams-notification\tests\TeamsNotificationTest.php on line 9