diff --git a/apstools/utils/tests/test_subnet_warning.py b/apstools/utils/tests/test_subnet_warning.py
index 80343a080..d180882af 100644
--- a/apstools/utils/tests/test_subnet_warning.py
+++ b/apstools/utils/tests/test_subnet_warning.py
@@ -1,6 +1,8 @@
 import socket
 from contextlib import nullcontext as does_not_raise
 
+import pytest
+
 from ..apsu_controls_subnet import APSU_CONTROLS_SUBNET
 from ..apsu_controls_subnet import APSU_XRAY_SUBNET
 from ..apsu_controls_subnet import warn_if_not_aps_controls_subnet