diff --git a/.travis.yml b/.travis.yml
index cd1bdfc..13f530d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,7 @@ python:
   - 3.5
   - 3.6
   - pypy
+  - pypy3
 
 script:
   - coverage run -m zope.testrunner --test-path=src