Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/cwtypo3/vendor/gmostafa/php-graphql-client/tests/MutationBuilderTest.php:9 Stack trace: #0 {main} thrown in /var/www/html/cwtypo3/vendor/gmostafa/php-graphql-client/tests/MutationBuilderTest.php on line 9