diff --git a/tox.ini b/tox.ini
index 5a620dc4ee..4e6d7a12d8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 minversion = 2.0
 skipsdist = True
-envlist = py35,py27,pep8
+envlist = py3,py27,pep8
 
 [testenv]
 setenv = VIRTUAL_ENV={envdir}
@@ -32,8 +32,8 @@ commands = oslo_debug_helper {posargs}
 basepython = python2.7
 commands = oslo_debug_helper {posargs}
 
-[testenv:debug-py35]
-basepython = python3.5
+[testenv:debug-py3]
+basepython = python3
 commands = oslo_debug_helper {posargs}
 
 [testenv:pep8]