Fatal error: Uncaught Error: Undefined constant "STDERR" in /home/jracing1/public_html/pospro.jracing.dev.br/tests/integration/PaymentsWebhookSignatureTest.php:22 Stack trace: #0 {main} thrown in /home/jracing1/public_html/pospro.jracing.dev.br/tests/integration/PaymentsWebhookSignatureTest.php on line 22