Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /opt/lampp/htdocs/kuesioner/vendor/phpunit/php-code-coverage/tests/_files/NamespaceCoverageCoversClassPublicTest.php:7 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/kuesioner/vendor/phpunit/php-code-coverage/tests/_files/NamespaceCoverageCoversClassPublicTest.php on line 7