diff --git a/tests/test_utils_pvpreload.py b/tests/test_utils_pvpreload.py
index cecfca979..8becc59e3 100644
--- a/tests/test_utils_pvpreload.py
+++ b/tests/test_utils_pvpreload.py
@@ -1,3 +1,4 @@
+import patch_put
 import pytest
 import time
 import threading