diff --git a/litellm/tests/test_litellm_pre_call_utils.py b/litellm/tests/test_litellm_pre_call_utils.py
new file mode 100644
index 000000000..7f56d693d
--- /dev/null
+++ b/litellm/tests/test_litellm_pre_call_utils.py
@@ -0,0 +1,60 @@
+"""
+Tests litellm pre_call_utils
+"""
+
+import os
+import sys
+import traceback
+import uuid
+from datetime import datetime
+
+from dotenv import load_dotenv
+from fastapi import Request
+from fastapi.routing import APIRoute
+
+from litellm.proxy._types import UserAPIKeyAuth
+from litellm.proxy.litellm_pre_call_utils import add_litellm_data_to_request
+from litellm.proxy.proxy_server import ProxyConfig, chat_completion
+
+load_dotenv()
+import io
+import os
+import time
+
+import pytest
+
+# this file is to test litellm/proxy
+
+sys.path.insert(
+    0, os.path.abspath("../..")
+)  # Adds the parent directory to the system path
+
+
+@pytest.mark.parametrize("tier", ["free", "paid"])
+@pytest.mark.asyncio()
+async def test_adding_key_tier_to_request_metadata(tier):
+    """
+    Tests if we can add tier: free/paid from key metadata to the request metadata
+    """
+    data = {}
+
+    api_route = APIRoute(path="/chat/completions", endpoint=chat_completion)
+    request = Request(
+        {
+            "type": "http",
+            "method": "POST",
+            "route": api_route,
+            "path": api_route.path,
+            "headers": [],
+        }
+    )
+    new_data = await add_litellm_data_to_request(
+        data=data,
+        request=request,
+        user_api_key_dict=UserAPIKeyAuth(metadata={"tier": tier}),
+        proxy_config=ProxyConfig(),
+    )
+
+    print("new_data", new_data)
+
+    assert new_data["metadata"]["tier"] == tier