diff --git a/.travis.yml b/.travis.yml
index 23ad032..0a94077 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ python:
   - "3.5"
   - "3.6"
   - "3.7"
+  - "pypy3.5-6.0"
 dist: xenial
 sudo: true