1 files changed, 3 insertions, 1 deletions
diff --git a/trade_queue.py b/trade_queue.py
index dcc9725..6cad1f5 100644
--- a/trade_queue.py
+++ b/trade_queue.py
@@ -1,7 +1,9 @@
 import logging
 from collections import deque
+from copy import deepcopy
 from decimal import Decimal
 from typing import Deque, List
+
 from trade import Trade
 
 # Set up a dedicated logger for FIFOQueue
@@ -28,7 +30,7 @@ class FIFOQueue:
         """
         Helper for unit tests, to check internal state.
         """
-        return [t for t in self.__queue]
+        return list(deepcopy(self.__queue))
 
     def add(self, amount: Decimal, total_cost: Decimal, date: str) -> None:
         """