Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home3/cp584787/public_html/wns.mwz/vendor/kalnoy/nestedset/tests/NodeTest.php:6 Stack trace: #0 {main} thrown in /home3/cp584787/public_html/wns.mwz/vendor/kalnoy/nestedset/tests/NodeTest.php on line 6