Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in I:\www\php_vendor_tests\vendor\mikey179\vfsstream\tests\phpunit\vfsStreamDirectoryTestCase.php:33 Stack trace: #0 {main} thrown in I:\www\php_vendor_tests\vendor\mikey179\vfsstream\tests\phpunit\vfsStreamDirectoryTestCase.php on line 33