Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /var/www/vhosts/www.thomas-bartholomaeus.de/content/neoscms/Packages/Libraries/neos/error-messages/Tests/Unit/MessageTest.php:19 Stack trace: #0 {main} thrown in /var/www/vhosts/www.thomas-bartholomaeus.de/content/neoscms/Packages/Libraries/neos/error-messages/Tests/Unit/MessageTest.php on line 19