diff --git a/.travis.yml b/.travis.yml
index 9a73c67..1eada0b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,17 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - hhvm
+
+before_script:
+  - composer self-update
+  - composer install --prefer-source --no-interaction --dev
 
 branches:
   only:
     - master
+
+matrix:
+  allow_failures:
+    - php: hhvm
+  fast_finish: true