diff --git a/tox.ini b/tox.ini
index ea292aeb..6810ae73 100644
--- a/tox.ini
+++ b/tox.ini
@@ -40,7 +40,7 @@ commands =
   stestr run --blacklist-file {env:BLACKLIST_FILE} {posargs}
 
 [testenv:cover]
-basepython = python2.7
+basepython = python3
 setenv =
     PYTHON=coverage run --source monasca_common --parallel-mode
 commands =