master
appraise 'rails-5.2.x' do gem 'rails', '~> 5.2.0' end appraise 'rails-6.0.x' do gem 'rails', '~> 6.0.0' end appraise 'rails-master' do gem 'rails', github: 'rails/rails', ref: :master gem 'arel', github: 'rails/arel', ref: :master end