Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in I:\www\pvcTestingUtils\vendor\pvc\struct\examples\tests\TreenodeOrderedTest.php:22 Stack trace: #0 {main} thrown in I:\www\pvcTestingUtils\vendor\pvc\struct\examples\tests\TreenodeOrderedTest.php on line 22