Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /Users/caiosilva/Sites/Laravel-test/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:18 Stack trace: #0 {main} thrown in /Users/caiosilva/Sites/Laravel-test/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php on line 18