diff --git a/.travis.yml b/.travis.yml
index 3da09d1ad1..319e36e88d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ language: php
 php:
   - 5.5
   - 5.6
+   - hhvm
 
 install:
   - rm composer.lock