diff --git a/tox.ini b/tox.ini
index dd97529..6c758fa 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,7 +21,8 @@ commands =
 commands = {posargs}
 
 [testenv:cover]
-commands = python setup.py testr --coverage
+setenv = NOSE_WITH_COVERAGE=1
+commands = nosetests {posargs}
 
 [tox:jenkins]
 downloadcache = ~/cache/pip