.travis.yml in sidekiq-hierarchy-2.0.1 vs .travis.yml in sidekiq-hierarchy-2.1.0

@@ -1,6 +1,10 @@
 language: ruby
 rvm:
   - jruby-1.7
   - jruby-9k
   - 2.2
+gemfile:
+  - Gemfile.sidekiq-3
+  - Gemfile.sidekiq-4
+  - Gemfile
 before_install: gem install bundler -v 1.10.6