diff --git a/letsencrypt/client/tests/configuration_test.py b/letsencrypt/client/tests/configuration_test.py
index 8e4a9def1..efc645ad4 100644
--- a/letsencrypt/client/tests/configuration_test.py
+++ b/letsencrypt/client/tests/configuration_test.py
@@ -1,5 +1,4 @@
 """Tests for letsencrypt.client.configuration."""
-import functools
 import unittest
 
 import mock