diff --git a/.travis.yml b/.travis.yml
index 3bf3161..b2a9ddc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,5 +3,7 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
+  - hhvm
 
 script: phpunit --coverage-text ./