devise: undefined method `rails5?' for Devise::Test:Module in 4.4.2

Environment

• Ruby 2.3.5
• Rails 5.1.5
• Devise 4.4.2

Current behavior

Controller specs where the user is not authenticated fail with this exception:

undefined method `rails5?' for Devise::Test:Module in 4.4.2

An example stack trace is:

NoMethodError:
       undefined method `rails5?' for Devise::Test:Module
     # /Users/moncefbelyamani/.gem/ruby/2.3.5/gems/devise-4.4.2/lib/devise/test/controller_helpers.rb:142:in `_process_unauthenticated'
     # /Users/moncefbelyamani/.gem/ruby/2.3.5/gems/devise-4.4.2/lib/devise/test/controller_helpers.rb:118:in `_catch_warden'
     # /Users/moncefbelyamani/.gem/ruby/2.3.5/gems/devise-4.4.2/lib/devise/test/controller_helpers.rb:35:in `process'
     # /Users/moncefbelyamani/.gem/ruby/2.3.5/gems/actionpack-5.1.5/lib/action_controller/test_case.rb:392:in `get'
     # /Users/moncefbelyamani/.gem/ruby/2.3.5/gems/rails-controller-testing-1.0.2/lib/rails/controller/testing/integration.rb:12:in `block (2 levels) in <module:Integration>'
     # ./spec/controllers/application_controller_spec.rb:103:in `block (4 levels) in <top (required)>'

Expected behavior

Tests that used to pass with Devise 4.4.1 continue to pass when upgrading Devise to 4.4.2