diff --git a/tests/common/beamlines/test_device_instantiation.py b/tests/common/beamlines/test_device_instantiation.py
index d67fc28179..40ef4856ea 100644
--- a/tests/common/beamlines/test_device_instantiation.py
+++ b/tests/common/beamlines/test_device_instantiation.py
@@ -1,4 +1,5 @@
 import importlib.util
+import os
 from collections.abc import Iterable
 from pathlib import Path
 from typing import Any