diff --git a/.travis.yml b/.travis.yml
index d518a61de..cb2c700cf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,8 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
+  - hhvm
 before_script:
   - npm install -g grunt-cli
   - npm install