Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/biigcom/public_html/backend/vendor/sebastian/code-unit/tests/unit/MapperTest.php:31 Stack trace: #0 {main} thrown in /home/biigcom/public_html/backend/vendor/sebastian/code-unit/tests/unit/MapperTest.php on line 31