Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/eberhardschwarze/public_html/vendor/ocramius/package-versions/test/PackageVersionsTest/InstallerTest.php:50 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/ocramius/package-versions/test/PackageVersionsTest/InstallerTest.php on line 50