language: ruby
rvm:
  - ruby-2.0.0
  - ruby-2.1.1
  - ruby-2.2.5
  - ruby-2.3.4
  - ruby-2.4.2
  - ruby-head
  - jruby-9.1.9.0
  - jruby-head
matrix:
  allow_failures:
    - rvm: ruby-head
    - rvm: jruby-head