diff --git a/src/allmydata/test/test_happiness.py b/src/allmydata/test/test_happiness.py
index bef3343e2..a8ed06363 100644
--- a/src/allmydata/test/test_happiness.py
+++ b/src/allmydata/test/test_happiness.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from twisted.trial import unittest
+from hypothesis import given
 from hypothesis.strategies import text, sets
 from allmydata.immutable import happiness_upload