diff --git a/python/langsmith/wrappers/_openai.py b/python/langsmith/wrappers/_openai.py
index a630e15b0..22b4e25c5 100644
--- a/python/langsmith/wrappers/_openai.py
+++ b/python/langsmith/wrappers/_openai.py
@@ -92,13 +92,13 @@ def _reduce_choices(choices: List[Choice]) -> dict:
                             "arguments": "",
                         }
                     if chunk.function.name:
-                        message["tool_calls"][index]["function"]["name"] += (
-                            chunk.function.name
-                        )
+                        message["tool_calls"][index]["function"][
+                            "name"
+                        ] += chunk.function.name
                     if chunk.function.arguments:
-                        message["tool_calls"][index]["function"]["arguments"] += (
-                            chunk.function.arguments
-                        )
+                        message["tool_calls"][index]["function"][
+                            "arguments"
+                        ] += chunk.function.arguments
     return {
         "index": choices[0].index,
         "finish_reason": next(
diff --git a/python/tests/integration_tests/test_context_propagation.py b/python/tests/integration_tests/test_context_propagation.py
index fbdb178df..32cd1f74d 100644
--- a/python/tests/integration_tests/test_context_propagation.py
+++ b/python/tests/integration_tests/test_context_propagation.py
@@ -37,7 +37,9 @@ async def the_parent_function():
         headers = {}
         if span := get_current_run_tree():
             headers.update(span.to_headers())
-        return await client.post("/fake-route", headers=headers)
+        response = await client.post("/fake-route", headers=headers)
+        assert response.status_code == 200
+        return response.json()
 
 
 @traceable
@@ -47,7 +49,11 @@ async def the_root_function(foo: str):
 
 @pytest.mark.asyncio
 async def test_tracing_fake_server(fake_server):
-    response = await the_root_function(
-        langsmith_extra={"metadata": {"some-cool-value": 42}, "tags": ["did-propagate"]}
+    result = await the_root_function(
+        "test input",
+        langsmith_extra={
+            "metadata": {"some-cool-value": 42},
+            "tags": ["did-propagate"],
+        },
     )
-    assert response.status_code == 200
+    assert result["message"] == "Fake route response"