diff --git a/tests/pexpects/signals.py b/tests/pexpects/signals.py
index 21177e6e7..92b32cc51 100644
--- a/tests/pexpects/signals.py
+++ b/tests/pexpects/signals.py
@@ -15,6 +15,7 @@ from time import sleep
 import os
 import signal
 import subprocess
+import sys
 
 expect_prompt()