diff --git a/tests/integration/observability/test_passthrough_upstream_error_visibility.py b/tests/integration/observability/test_passthrough_upstream_error_visibility.py
index bb18add2f2ff..c29ce4f1c624 100644
--- a/tests/integration/observability/test_passthrough_upstream_error_visibility.py
+++ b/tests/integration/observability/test_passthrough_upstream_error_visibility.py
@@ -238,6 +238,7 @@ def respond(request: Request) -> Reply:
                 "target": f"{wire.url}/upstream?trace=secret-q",
                 "include_subpath": True,
                 "headers": {"Authorization": "Bearer scripted"},
+                "auth": True,
             }
         ]
         path.write_text(yaml.safe_dump(config))