diff --git a/.travis.yml b/.travis.yml
index 95e1f6f..96788ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,9 @@
 language: python
 python:
   - "2.7"
+  - "3.4"
+  - "3.5"
+  - "3.6"
 install:
   - pip install pycodestyle==2.3.1
   - pip install ./zulip