Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in I:\www\pvcStorage\vendor\mikey179\vfsstream\tests\phpunit\Issue104TestCase.php:28 Stack trace: #0 {main} thrown in I:\www\pvcStorage\vendor\mikey179\vfsstream\tests\phpunit\Issue104TestCase.php on line 28