Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/edmedu/www/edmtw.com/dev.bak/vendor/symfony/var-dumper/Tests/Cloner/VarClonerTest.php:21 Stack trace: #0 {main} thrown in /home/edmedu/www/edmtw.com/dev.bak/vendor/symfony/var-dumper/Tests/Cloner/VarClonerTest.php on line 21