1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 81c66758..80e0a15c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,7 +2,7 @@
 envlist = py26,py27,pypy,py32,py33,docs,pep8
 
 [testenv]
-deps = pytest-cov
+deps = pytest-cov pretend
 commands = py.test --cov=cryptography/ --cov=tests/
 
 [testenv:docs]