diff --git a/tsstats/tests/test_cache.py b/tsstats/tests/test_cache.py
index 2f81965..5f9c1f2 100644
--- a/tsstats/tests/test_cache.py
+++ b/tsstats/tests/test_cache.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 import os
 import shutil
-from pickle import UnpicklingError
 
 import pytest