language: ruby rvm: - 2.6.3 - 2.3.3 - ruby-head sudo: false matrix: allow_failures: - rvm: ruby-head exclude: - rvm: 2.3.3 gemfile: gemfiles/6.0.gemfile gemfile: - gemfiles/5.0.gemfile - gemfiles/5.2.gemfile - gemfiles/6.0.gemfile