Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /data/htmlwww/common/jpgraph/vendor/sebastian/diff/tests/Exception/InvalidArgumentExceptionTest.php:18 Stack trace: #0 {main} thrown in /data/htmlwww/common/jpgraph/vendor/sebastian/diff/tests/Exception/InvalidArgumentExceptionTest.php on line 18