diff --git a/tests/test_utils_opmsg.py b/tests/test_utils_opmsg.py
index eafc36df5..b2da24268 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