Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\Test\ConstraintValidatorTestCase' not found in /home/clapsabo/test/vendor/symfony/validator/Tests/Constraints/IssnValidatorTest.php:21 Stack trace: #0 {main} thrown in /home/clapsabo/test/vendor/symfony/validator/Tests/Constraints/IssnValidatorTest.php on line 21