Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\laragon\www\teeu\vendor\kalnoy\nestedset\tests\ScopedNodeTest.php:6 Stack trace: #0 {main} thrown in D:\laragon\www\teeu\vendor\kalnoy\nestedset\tests\ScopedNodeTest.php on line 6