Fatal error: Uncaught Error: Undefined constant "STDOUT" in /home/supratz/www/skyboard-refac/backend/tests/SecurityHeadersMiddlewareTest.php:35 Stack trace: #0 /home/supratz/www/skyboard-refac/backend/tests/SecurityHeadersMiddlewareTest.php(39): SecurityHeadersMiddlewareTest->run() #1 {main} thrown in /home/supratz/www/skyboard-refac/backend/tests/SecurityHeadersMiddlewareTest.php on line 35