diff --git a/tox.ini b/tox.ini
index 38479371d..5dcd581a3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -45,8 +45,8 @@ commands = oslo_debug_helper {posargs}
 basepython = python2.7
 commands = oslo_debug_helper {posargs}
 
-[testenv:debug-py34]
-basepython = python3.4
+[testenv:debug-py35]
+basepython = python3.5
 commands = oslo_debug_helper {posargs}
 
 [testenv:migration]