Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/phprplacein/public_html/vendor/symfony/framework-bundle/Tests/Validator/ConstraintValidatorFactoryTest.php:21 Stack trace: #0 {main} thrown in /home/phprplacein/public_html/vendor/symfony/framework-bundle/Tests/Validator/ConstraintValidatorFactoryTest.php on line 21