diff --git a/tox.ini b/tox.ini
index 33c4117..5d890cb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,7 +18,7 @@ commands = flake8 {posargs}
 commands = {posargs}
 
 [testenv:cover]
-commands = python setup.py test --coverage --testr-args='{posargs}'
+commands = python setup.py test --coverage --coverage-package-name=mistral_lib --testr-args='{posargs}'
 
 [testenv:docs]
 commands = python setup.py build_sphinx