Try to fix Travis' problem

cwacek · cwacek · commit 08beecddb599 · 2017-10-07T18:36:57.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,7 @@
 language: python
 python:
 - '2.7'
+- '3.5'
 install:
 - pip install tox
 script: tox
