diff --git a/log10/load.py b/log10/load.py
index 1eddf994..2cd3c339 100644
--- a/log10/load.py
+++ b/log10/load.py
@@ -153,7 +153,7 @@ def last_completion_url(self):
         if last_completion_response_var.get() is None:
             return None
         response = last_completion_response_var.get()
-        return url + "/app/" + response["organizationSlug"] + "/completions/" + response["completionID"]
+        return f'{url}/app/{response["organizationSlug"]}/completions/{response["completionID"]}'
 
 
 @contextmanager
@@ -196,8 +196,6 @@ async def log_async(completion_url, log_row):
                 res = post_request(_url, log_row)
             except Exception as e:
                 logging.warn(f"LOG10: failed to log: {e}. Skipping")
-                # Print the exception tracompletion_urlceback
-                traceback.print_tb(e.__traceback__)
                 return None
 
         elif target_service == "bigquery":
@@ -206,8 +204,6 @@ async def log_async(completion_url, log_row):
 
     except Exception as e:
         logging.warn(f"LOG10: failed to log: {e}. Skipping")
-        # Print the exception traceback
-        traceback.print_tb(e.__traceback__)
         return None
 
     return completionID
diff --git a/tests/test_context_managers.py b/tests/test_context_managers.py
index f7ad3d2e..345371e7 100644
--- a/tests/test_context_managers.py
+++ b/tests/test_context_managers.py
@@ -1,7 +1,7 @@
 import asyncio
 import contextvars
 import uuid
-
+import pytest
 
 session_id_var = contextvars.ContextVar("session_id", default=str(uuid.uuid4()))
 
@@ -52,7 +52,7 @@ def test_nested_contexts():
 
     assert simulated_llm_call() == before_outer_session
 
-
+@pytest.mark.asyncio
 async def test_nested_async_contexts():
     print("")
     before_outer_session = await simulated_llm_acall()
@@ -74,6 +74,7 @@ async def test_nested_async_contexts():
 
 
 # Test overlapping async context managers
+@pytest.mark.asyncio
 async def test_overlapping_async_contexts():
     # Run two async context managers in parallel
     # The second one should not overwrite the session ID of the first one