diff --git a/tox.ini b/tox.ini
index 12eb0a22..f95fe8ef 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ commands = nosetests {posargs}
 commands = pep8 --repeat --show-source --exclude=.venv,.tox,dist,doc,*egg .
 
 [testenv:cover]
-setenv = NOSE_WITH_COVERAGE=1
+commands = nosetests --cover-erase --cover-package=glanceclient --with-xcoverage
 
 [testenv:venv]
 commands = {posargs}