Fatal error: Uncaught Error: Class 'Contao\CoreBundle\Tests\TestCase' not found in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/tests/HttpKernel/Header/MemoryHeaderStorageTest.php:19 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/tests/HttpKernel/Header/MemoryHeaderStorageTest.php on line 19