Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/rosengar/Lib/composerRosengartPHP7/vendor/symfony/yaml/Tests/InlineTest.php:17 Stack trace: #0 {main} thrown in /home/rosengar/Lib/composerRosengartPHP7/vendor/symfony/yaml/Tests/InlineTest.php on line 17