Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/itiffy/public_html/vendor/phpunit/phpunit-mock-objects/tests/GeneratorTest.php:28 Stack trace: #0 {main} thrown in /home/itiffy/public_html/vendor/phpunit/phpunit-mock-objects/tests/GeneratorTest.php on line 28