Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\Apache24\htdocs\vendor.old\benwilkins\laravel-fcm-notification\tests\TestCase.php:8 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor.old\benwilkins\laravel-fcm-notification\tests\TestCase.php on line 8