Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/demoinvfsanz/public_html/vendor/laravel/framework/tests/Validation/ValidationValidatorTest.php:18 Stack trace: #0 {main} thrown in /home/demoinvfsanz/public_html/vendor/laravel/framework/tests/Validation/ValidationValidatorTest.php on line 18