We do not need to check coverage for this project.

--- voluptuous-0.16.0/tox.ini.orig
+++ voluptuous-0.16.0/tox.ini
@@ -12,11 +12,8 @@
 sitepackages = False
 deps =
     pytest
-    pytest-cov
-    coverage>=3.0
 commands =
     pytest \
-        --cov=voluptuous \
         voluptuous/tests/
 
 [testenv:flake8]