diff --git a/tox.ini b/tox.ini
index 064d5b0b23..8d971f8d72 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,6 +16,13 @@ deps =
   -r{toxinidir}/test-requirements.txt
 commands = nosetests test/unit {posargs}
 
+[testenv:cover]
+setenv = VIRTUAL_ENV={envdir}
+         NOSE_WITH_COVERAGE=1
+         NOSE_COVER_BRANCHES=1
+         NOSE_COVER_HTML=1
+         NOSE_COVER_HTML_DIR={toxinidir}/cover
+
 [tox:jenkins]
 downloadcache = ~/cache/pip