diff --git a/libs/partners/openai/langchain_openai/chat_models/base.py b/libs/partners/openai/langchain_openai/chat_models/base.py
index fab01e29d63..50cb985a572 100644
--- a/libs/partners/openai/langchain_openai/chat_models/base.py
+++ b/libs/partners/openai/langchain_openai/chat_models/base.py
@@ -3056,7 +3056,8 @@ def _construct_responses_api_payload(
 
             if tool["type"] == "image_generation" and "partial_images" in tool:
                 raise NotImplementedError(
-                    "Partial image generation is not yet supported via the LangChain ChatOpenAI client. "
+                    "Partial image generation is not yet supported "
+                    "via the LangChain ChatOpenAI client. "
                 )
         payload["tools"] = new_tools
     if tool_choice := payload.pop("tool_choice", None):
diff --git a/libs/partners/openai/tests/integration_tests/chat_models/test_responses_api.py b/libs/partners/openai/tests/integration_tests/chat_models/test_responses_api.py
index 136229847d0..165a756761c 100644
--- a/libs/partners/openai/tests/integration_tests/chat_models/test_responses_api.py
+++ b/libs/partners/openai/tests/integration_tests/chat_models/test_responses_api.py
@@ -453,6 +453,7 @@ def test_mcp_builtin() -> None:
         [approval_message], previous_response_id=response.response_metadata["id"]
     )
 
+
 @pytest.mark.skip(reason="Re-enable once VCR is properly set up.")
 @pytest.mark.vcr()
 def test_image_generation_streaming() -> None: