diff --git a/.travis.yml b/.travis.yml
index 47db795..e28ccab 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,11 @@ language: php
 php:
   - '5.6'
   - '7.0'
+  - 'hhvm'
+
+matrix:
+   allow_failures:
+         - php: 'hhvm'
 
 before_script:
    - composer install