diff --git a/pyproject.toml b/pyproject.toml
index 5f60d4351..8e65536a0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -223,7 +223,7 @@ disable = ["R0801"]
 extend-exclude = ["tests/profiles/syntax_error.py"]
 
 [tool.ruff.lint]
-extend-select = ["TID251", "UP006", "UP007", "UP017", "UP035", "RUF100", "B010"]
+extend-select = ["TID251", "UP006", "UP007", "UP017", "UP035", "RUF100", "B009", "B010"]
 
 [tool.ruff.lint.flake8-tidy-imports.banned-api]
 unittest = { msg = "use pytest instead of unittest" }
diff --git a/src/app/endpoints/streaming_query.py b/src/app/endpoints/streaming_query.py
index d77f26807..d04e9d5be 100644
--- a/src/app/endpoints/streaming_query.py
+++ b/src/app/endpoints/streaming_query.py
@@ -698,7 +698,7 @@ async def response_generator(  # pylint: disable=too-many-branches,too-many-stat
         # Completed response - capture final text and response object
         elif event_type == "response.completed":
             latest_response_object = cast(
-                OpenAIResponseObject, getattr(chunk, "response")
+                OpenAIResponseObject, getattr(chunk, "response")  # noqa: B009
             )
             turn_summary.llm_response = turn_summary.llm_response or "".join(text_parts)
             yield stream_event(
@@ -714,7 +714,7 @@ async def response_generator(  # pylint: disable=too-many-branches,too-many-stat
         # Incomplete or failed response - emit error
         elif event_type in ("response.incomplete", "response.failed"):
             latest_response_object = cast(
-                OpenAIResponseObject, getattr(chunk, "response")
+                OpenAIResponseObject, getattr(chunk, "response")  # noqa: B009
             )
             error_message = (
                 latest_response_object.error.message