Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\r10csm\vendor\laravel\framework\tests\Foundation\FoundationExceptionsHandlerTest.php:45 Stack trace: #0 {main} thrown in C:\xampp\htdocs\r10csm\vendor\laravel\framework\tests\Foundation\FoundationExceptionsHandlerTest.php on line 45