diff --git a/tests/entrypoints/openai/test_chat.py b/tests/entrypoints/openai/test_chat.py
index 8d23a2be6f9bb..47c521a9b5eb5 100644
--- a/tests/entrypoints/openai/test_chat.py
+++ b/tests/entrypoints/openai/test_chat.py
@@ -482,6 +482,7 @@ async def test_guided_choice_chat(client: openai.AsyncOpenAI,
         model=MODEL_NAME,
         messages=messages,
         max_completion_tokens=10,
+        temperature=0.7,
         extra_body=dict(guided_choice=sample_guided_choice,
                         guided_decoding_backend=guided_decoding_backend))
     choice1 = chat_completion.choices[0].message.content
@@ -496,6 +497,7 @@ async def test_guided_choice_chat(client: openai.AsyncOpenAI,
         model=MODEL_NAME,
         messages=messages,
         max_completion_tokens=10,
+        temperature=0.7,
         extra_body=dict(guided_choice=sample_guided_choice,
                         guided_decoding_backend=guided_decoding_backend))
     choice2 = chat_completion.choices[0].message.content