appraise 'rails-4.2' do
  gem 'activerecord', '~> 4.2.8', group: :test, require: false
end

appraise 'rails-5.0' do
  gem 'activerecord', '~> 5.0.3', group: :test, require: false
end

appraise 'rails-5.1' do
  gem 'activerecord', '~> 5.1.1', group: :test, require: false
end