diff --git a/.travis.yml b/.travis.yml
index 3ae06d8..7b1404d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,5 +5,6 @@ python:
   - 3.5
   - 3.6
   - pypy
+  - pypy3
 install: python setup.py install
 script: python setup.py test