diff --git a/src/databricks/sql/client.py b/src/databricks/sql/client.py
index 1a246b7c1..8a8a312ee 100755
--- a/src/databricks/sql/client.py
+++ b/src/databricks/sql/client.py
@@ -434,7 +434,8 @@ def __exit__(self, exc_type, exc_value, traceback):
         self.close()
 
     def __del__(self):
-        if self.open:
+        initialized = hasattr(self, "session")
+        if initialized and self.open:
             logger.debug(
                 "Closing unclosed connection for session "
                 "{}".format(self.get_session_id_hex())