diff --git a/litellm/proxy/proxy_server.py b/litellm/proxy/proxy_server.py
index 925f8dfc0..6af2a9d48 100644
--- a/litellm/proxy/proxy_server.py
+++ b/litellm/proxy/proxy_server.py
@@ -743,7 +743,9 @@ async def _PROXY_track_cost_callback(
                     f"Model not in litellm model cost map. Add custom pricing - https://docs.litellm.ai/docs/proxy/custom_pricing"
                 )
     except Exception as e:
-        verbose_proxy_logger.debug(f"error in tracking cost callback - {str(e)}")
+        verbose_proxy_logger.debug(
+            f"error in tracking cost callback - {traceback.format_exc}"
+        )
 
 
 async def update_database(
diff --git a/tests/test_keys.py b/tests/test_keys.py
index ee8789f38..52eb7ad24 100644
--- a/tests/test_keys.py
+++ b/tests/test_keys.py
@@ -318,6 +318,17 @@ async def test_key_info_spend_values():
         rounded_response_cost = round(response_cost, 8)
         rounded_key_info_spend = round(key_info["info"]["spend"], 8)
         assert rounded_response_cost == rounded_key_info_spend
+
+
+@pytest.mark.asyncio
+async def test_key_info_spend_values_streaming():
+    """
+    Test to ensure spend is correctly calculated.
+    - create key
+    - make completion call
+    - assert cost is expected value
+    """
+    async with aiohttp.ClientSession() as session:
         ## streaming - azure
         key_gen = await generate_key(session=session, i=0)
         new_key = key_gen["key"]
@@ -332,6 +343,7 @@ async def test_key_info_spend_values():
         )
         response_cost = prompt_cost + completion_cost
         await asyncio.sleep(5)  # allow db log to be updated
+        print(f"new_key: {new_key}")
         key_info = await get_key_info(
             session=session, get_key=new_key, call_key=new_key
         )