diff --git a/.travis.yml b/.travis.yml
index baca1979..9ed0b976 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ php:
   - 5.4
   - 5.5
   - 5.6
+  - hhvm
 
 allow_failures:
     - php: hhvm