diff --git a/test/conftest.py b/test/conftest.py
index 526e6c4..3105328 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -1,6 +1,7 @@
 import pytest
 import pkgutil
 import json
+import os
 
 from pyhamtools import LookupLib
 from pyhamtools import Callinfo