language: ruby

rvm:
  - 2.3
  - 2.2
  - ruby-head
  - rbx
  - jruby-head

before_install:
  - gem install bundler

language: ruby

rvm:
  - 2.3
  - 2.2
  - ruby-head
  - rbx-2
  - jruby-head

before_install:
  - gem install bundler

Use rbx-2, instead of rbx
Use rbx-2, instead of rbx

ref: https://docs.travis-ci.com/user/languages/ruby/
