appraise 'rails-5.0' do gem 'rails', '~> 5.0.0' end appraise 'rails-5.1' do gem 'rails', '~> 5.1.0' end appraise 'rails-5.2' do gem 'rails', '~> 5.2.0' end appraise 'rails-5.2.1' do gem 'rails', '~> 5.2.1' end appraise 'rails-6.0.0' do gem 'rails', '6.0.0' end appraise 'rails-master' do gem 'rails', git: 'https://github.com/rails/rails.git', branch: 'master' gem 'arel', git: 'https://github.com/rails/arel.git', branch: 'master' %w[rspec-core rspec-expectations rspec-mocks rspec-rails rspec-support].each do |lib| gem lib, git: "https://github.com/rspec/#{lib}.git", branch: 'master' end end