diff --git a/tests/test_utils_opmsg.py b/tests/test_utils_opmsg.py
index c872dcb5c..8ac16d9c2 100644
--- a/tests/test_utils_opmsg.py
+++ b/tests/test_utils_opmsg.py
@@ -1,3 +1,4 @@
+import patch_put
 import time
 import threading
 import pytest