diff --git a/litellm/tests/test_completion.py b/litellm/tests/test_completion.py
index beef7407c5..306f0b2f6e 100644
--- a/litellm/tests/test_completion.py
+++ b/litellm/tests/test_completion.py
@@ -139,7 +139,7 @@ def test_completion_gpt4_vision():
         pass
     except Exception as e:
         pytest.fail(f"Error occurred: {e}")
-# test_completion_gpt4_vision()
+test_completion_gpt4_vision()
 
 def test_completion_perplexity_api():
     try:
diff --git a/litellm/utils.py b/litellm/utils.py
index 0268bf99a6..ac8c9d8d29 100644
--- a/litellm/utils.py
+++ b/litellm/utils.py
@@ -1154,7 +1154,7 @@ def client(original_function):
                 elif kwargs.get("messages", None):
                     messages = kwargs["messages"]
                 ### PRE-CALL RULES ### 
-                rules_obj.pre_call_rules(input="".join(m["content"] for m in messages), model=model)
+                rules_obj.pre_call_rules(input="".join(m["content"] for m in messages if isinstance(m["content"], str)), model=model)
             elif call_type == CallTypes.embedding.value:
                 messages = args[1] if len(args) > 1 else kwargs["input"]
             stream = True if "stream" in kwargs and kwargs["stream"] == True else False