diff --git a/tests/entrypoints/openai/test_serving_chat.py b/tests/entrypoints/openai/test_serving_chat.py
index 04805dbca74f..39a18b9daeca 100644
--- a/tests/entrypoints/openai/test_serving_chat.py
+++ b/tests/entrypoints/openai/test_serving_chat.py
@@ -178,7 +178,7 @@ async def test_gpt_oss_multi_turn_chat(gptoss_client: OpenAI,
         },
         {
             "role": "user",
-            "content": "What is the weather in Dallas, TX?"
+            "content": "What is the weather in Dallas, TX with celsius?"
         },
     ]