diff --git a/.travis.yml b/.travis.yml
index 5a18cf6..f22a356 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,7 @@
 language: python
 sudo: false
 python:
+    - pypy
     - 3.3
 install:
     - pip install . --use-mirrors