language: ruby rvm: - 2.1 - 2.2.5 - 2.3.3 - 2.4.0 - ruby-head gemfile: - Gemfile - Gemfile.v0.12 branches: only: - master before_install: gem update bundler script: bundle exec rake test sudo: false matrix: allow_failures: - rvm: 2.4.0 - rvm: ruby-head