language: ruby
script: 'bundle exec rake test:unit'
sudo: false
matrix:
  include:
    - rvm: 2.1.10
      gemfile: gemfiles/HEAD.gemfile
    - rvm: 2.2.7
      gemfile: gemfiles/HEAD.gemfile
    - rvm: 2.3.4
      gemfile: gemfiles/HEAD.gemfile
    - rvm: 2.4.1
      gemfile: gemfiles/HEAD.gemfile