diff --git a/.travis.yml b/.travis.yml
index 776d6a9b15b..96f47d3d858 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,12 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
+  - hhvm
+
+matrix:
+  allow_failures:
+    - php: hhvm
 
 before_script:
   - composer install --dev --prefer-source