diff --git a/.travis.yml b/.travis.yml
index 0d4ac0c..5037b20 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,9 @@ language: python
 python:
   - "3.4"
   - "3.5"
+  - "3.6"
+  - "nightly"
+  - "pypy3"
 install: pip install -U pytest pytest-runner
 script: python setup.py ptr
 env: