diff --git a/.travis.yml b/.travis.yml
index 03b5d1d..b8f53a6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,8 +6,9 @@ python:
   - "3.4"
   - "3.5"
   - "3.6"
-  - "3.7"
+  - "3.7-dev"
   - "pypy"
+  - "pypy3"
 
 sudo: false