diff --git a/tox.ini b/tox.ini
index d4af50fa5..bf609a747 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ setenv =
 basepython = python2.7
 commands =
     pip install -e .[testing]
-    python setup.py nosetests --with-coverage --cover-min-percentage=83
+    python setup.py nosetests --with-coverage --cover-min-percentage=85
 
 [testenv:lint]
 # recent versions of pylint do not support Python 2.6 (#97, #187)