diff --git a/test-requirements.txt b/test-requirements.txt
index 6b6c1a9a..4844ad12 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -11,3 +11,4 @@ discover
 fixtures>=0.3.14
 testrepository>=0.0.17
 testtools>=0.9.32
+coverage>=3.6
diff --git a/tox.ini b/tox.ini
index ea094a23..50ed3957 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,10 @@ commands =
 sitepackages = False
 
 [testenv:cover]
-commands = nosetests --no-path-adjustment --with-coverage --cover-erase --cover-package=climate --cover-inclusive []
+setenv = VIRTUAL_ENV={envdir}
+commands =
+  python setup.py testr --coverage \
+    --testr-args='^(?!.*test.*coverage).*$'
 
 [testenv:pep8]
 commands = flake8 {posargs}