diff --git a/tests/llm_responses_api_testing/test_openai_responses_api.py b/tests/llm_responses_api_testing/test_openai_responses_api.py
index 5f77d5a5477..cbe8204bfb5 100644
--- a/tests/llm_responses_api_testing/test_openai_responses_api.py
+++ b/tests/llm_responses_api_testing/test_openai_responses_api.py
@@ -1818,6 +1818,7 @@ async def test_extra_body_merges_with_request_data(extra_body_mock_response_data
             input="Test",
             temperature=0.7,
             max_output_tokens=20,
+            reasoning={"effort": "none"},
             extra_body={
                 "custom_field": "custom_value",
             },
diff --git a/tests/openai_endpoints_tests/test_e2e_openai_responses_api.py b/tests/openai_endpoints_tests/test_e2e_openai_responses_api.py
index be565972b94..6abc6813761 100644
--- a/tests/openai_endpoints_tests/test_e2e_openai_responses_api.py
+++ b/tests/openai_endpoints_tests/test_e2e_openai_responses_api.py
@@ -115,9 +115,9 @@ def test_bad_request_error():
 def test_bad_request_bad_param_error():
     client = get_test_client()
     with pytest.raises(BadRequestError):
-        # Trigger error with invalid model name
+        # needs a non-reasoning model so drop_params keeps temperature for OpenAI to reject
         client.responses.create(
-            model="gpt-5.5", input="This should fail", temperature=2000
+            model="gpt-4.1-mini", input="This should fail", temperature=2000
         )