diff --git a/litellm/tests/test_proxy_utils.py b/litellm/tests/test_proxy_utils.py
new file mode 100644
index 0000000000..aea81b0173
--- /dev/null
+++ b/litellm/tests/test_proxy_utils.py
@@ -0,0 +1,62 @@
+import asyncio
+from unittest.mock import Mock
+
+import pytest
+from fastapi import Request
+
+from litellm.proxy._types import UserAPIKeyAuth
+from litellm.proxy.litellm_pre_call_utils import add_litellm_data_to_request
+from litellm.types.utils import SupportedCacheControls
+
+
+@pytest.fixture
+def mock_request(monkeypatch):
+    mock_request = Mock(spec=Request)
+    mock_request.query_params = {}  # Set mock query_params to an empty dictionary
+    mock_request.headers = {}
+    monkeypatch.setattr(
+        "litellm.proxy.litellm_pre_call_utils.add_litellm_data_to_request", mock_request
+    )
+    return mock_request
+
+
+@pytest.mark.parametrize("endpoint", ["/v1/threads", "/v1/thread/123"])
+@pytest.mark.asyncio
+async def test_add_litellm_data_to_request_thread_endpoint(endpoint, mock_request):
+    mock_request.url.path = endpoint
+    user_api_key_dict = UserAPIKeyAuth(
+        api_key="test_api_key", user_id="test_user_id", org_id="test_org_id"
+    )
+    proxy_config = Mock()
+
+    data = {}
+    await add_litellm_data_to_request(
+        data, mock_request, user_api_key_dict, proxy_config
+    )
+
+    print("DATA: ", data)
+
+    assert "litellm_metadata" in data
+    assert "metadata" not in data
+
+
+@pytest.mark.parametrize(
+    "endpoint", ["/chat/completions", "/v1/completions", "/completions"]
+)
+@pytest.mark.asyncio
+async def test_add_litellm_data_to_request_non_thread_endpoint(endpoint, mock_request):
+    mock_request.url.path = endpoint
+    user_api_key_dict = UserAPIKeyAuth(
+        api_key="test_api_key", user_id="test_user_id", org_id="test_org_id"
+    )
+    proxy_config = Mock()
+
+    data = {}
+    await add_litellm_data_to_request(
+        data, mock_request, user_api_key_dict, proxy_config
+    )
+
+    print("DATA: ", data)
+
+    assert "metadata" in data
+    assert "litellm_metadata" not in data