Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in I:\www\pvcStruct - corrupt\tests\unit_tests\tree\node\TreenodeCollectionTest.php:14 Stack trace: #0 {main} thrown in I:\www\pvcStruct - corrupt\tests\unit_tests\tree\node\TreenodeCollectionTest.php on line 14