diff --git a/.travis.yml b/.travis.yml
index 11c5e5f..64ae90c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ language: php
 php:
   - 5.4
   - 5.5
+  - hhvm
 
 services:
   - redis-server