diff --git a/.travis.yml b/.travis.yml
index 793ab18..3e6f1a4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,8 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
+  - hhvm
 
 before_script:
   - wget http://getcomposer.org/composer.phar