diff --git a/testing/acceptance_test.py b/testing/acceptance_test.py
index cc9b3ee..77e8ce4 100644
--- a/testing/acceptance_test.py
+++ b/testing/acceptance_test.py
@@ -1,5 +1,6 @@
 import os
 import re
+import sys
 import textwrap
 
 import py