diff --git a/.travis.yml b/.travis.yml
index 65d411a51..05f17008e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,7 @@ php:
   - 5.4
   - 5.5
   - 5.6
+  - hhvm
 
 before_script:
   - make composer-install-dev
@@ -19,7 +20,7 @@ script:
 
 matrix:
   allow_failures:
-    - php: 5.6
+    - php: hhvm
 
 notifications:
   irc: