diff --git a/tox.ini b/tox.ini
index 79f273d2..4c49b6a2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,6 +14,7 @@ deps = -r{toxinidir}/test-requirements.txt
 commands = ostestr
 
 [testenv:pep8]
+basepython=python2
 deps = hacking==0.10.2
 usedevelop = False
 commands =