Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/demohatinco/public_html/construction_management_system_backend_del/vendor/sebastian/diff/tests/Exception/ConfigurationExceptionTest.php:18 Stack trace: #0 {main} thrown in /home/demohatinco/public_html/construction_management_system_backend_del/vendor/sebastian/diff/tests/Exception/ConfigurationExceptionTest.php on line 18