diff --git a/litellm/tests/test_custom_callback_input.py b/litellm/tests/test_custom_callback_input.py
index eae0412d39..1dc4321217 100644
--- a/litellm/tests/test_custom_callback_input.py
+++ b/litellm/tests/test_custom_callback_input.py
@@ -232,6 +232,7 @@ class CompletionCustomHandler(
             assert isinstance(kwargs["messages"], list) and isinstance(
                 kwargs["messages"][0], dict
             )
+
             assert isinstance(kwargs["optional_params"], dict)
             assert isinstance(kwargs["litellm_params"], dict)
             assert isinstance(kwargs["start_time"], (datetime, type(None)))