diff --git a/.travis.yml b/.travis.yml
index d1d13c3b..4ad0ff67 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,11 @@ language: php
 php:
   - 5.4
   - 5.5
+  - hhvm
+
+matrix:
+  allow_failures:
+    - php: hhvm
 
 before_script: composer install --prefer-source
 script: phpunit --configuration phpunit.xml.dist