diff --git a/.travis.yml b/.travis.yml
index 1bc56262d..c3a6c59e6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,8 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
+  - hhvm
 
 before_script: 
     - composer install --dev --prefer-source