Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /users/danielstruebig/www/firma/vendor/guzzlehttp/psr7/tests/LazyOpenStreamTest.php:10 Stack trace: #0 {main} thrown in /users/danielstruebig/www/firma/vendor/guzzlehttp/psr7/tests/LazyOpenStreamTest.php on line 10