diff --git a/tests/test_litellm/llms/anthropic/chat/test_anthropic_chat_transformation.py b/tests/test_litellm/llms/anthropic/chat/test_anthropic_chat_transformation.py
index 8ebdfcb47bc..5d7a02f90d8 100644
--- a/tests/test_litellm/llms/anthropic/chat/test_anthropic_chat_transformation.py
+++ b/tests/test_litellm/llms/anthropic/chat/test_anthropic_chat_transformation.py
@@ -1662,7 +1662,7 @@ def test_max_effort_rejected_for_opus_45():
 
     messages = [{"role": "user", "content": "Test"}]
 
-    with pytest.raises(ValueError, match="effort='max' is only supported by Claude Opus 4.6"):
+    with pytest.raises(ValueError, match="effort='max' is only supported by Claude 4.6 models"):
         optional_params = {"output_config": {"effort": "max"}}
         config.transform_request(
             model="claude-opus-4-5-20251101",