diff --git a/.travis.yml b/.travis.yml
index 48aa8b2..36ee77c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ python:
   - "3.3"
   - "3.4"
   - "3.5"
+  - "pypy"
 before_install:
   - "sudo apt-get update -qq"
   - "sudo apt-get install -y xvfb"