diff --git a/.travis.yml b/.travis.yml
index 73c9b2b..5bde91a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,9 @@ language: php
 php:
  - 5.3
  - 5.4
+ - 5.5
+ - 5.6
+ - hhvm
 
 before_script:
   - composer self-update
@@ -13,4 +16,4 @@ script:
   - ./vendor/bin/phpunit -c phpunit.dist.xml
 
 after_script:
-  - ./vendor/bin/coveralls
+  - sh -c 'if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then php vendor/bin/coveralls -v; fi;'