diff --git a/tests/entrypoints/openai/responses/test_harmony.py b/tests/entrypoints/openai/responses/test_harmony.py
index ef014b2c21ad..e99a299c12ee 100644
--- a/tests/entrypoints/openai/responses/test_harmony.py
+++ b/tests/entrypoints/openai/responses/test_harmony.py
@@ -992,7 +992,7 @@ async def test_mcp_tool_multi_turn(client: OpenAI, model_name: str, server):
     # First turn - make a calculation
     response1 = await client.responses.create(
         model=model_name,
-        input="Calculate 123 * 456 using python and print the result.",
+        input="Calculate 1234 * 4567 using python tool and print the result.",
         tools=tools,
         temperature=0.0,
         instructions=(