diff --git a/tests/test_full_stack_contract.py b/tests/test_full_stack_contract.py
index 9688b1e..e41be6d 100644
--- a/tests/test_full_stack_contract.py
+++ b/tests/test_full_stack_contract.py
@@ -1,6 +1,7 @@
 import base64
 import importlib.util
 import os
+import sys
 from pathlib import Path
 
 import pytest