Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /itss/home/arcelormittal/public_html/vendor/myclabs/php-enum/tests/EnumTest.php:14 Stack trace: #0 {main} thrown in /itss/home/arcelormittal/public_html/vendor/myclabs/php-enum/tests/EnumTest.php on line 14