1 files changed, 2 insertions, 2 deletions
diff --git a/tox.ini b/tox.ini
index 4a80fc8b..5d214bd6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,8 +2,8 @@
 envlist = py26,py27,pypy,py32,py33,docs,pep8
 
 [testenv]
-deps = pytest
-commands = py.test
+deps = pytest-cov
+commands = py.test --cov=cryptography/
 
 [testenv:docs]
 deps = sphinx