Testing with Rails 6.1

[sFrenkie]

At first thank all to make this gem.

Maybe I need more helps than it's bug.
After upgrade to Rails 6.1
I hit the issue wher url_for method don't know the route

ActionView::Template::Error:
  No route matches {:locale=>:en}

There are missing like controller and action in params.
I tried to update rspec settings to add

config.include Devise::Test::ControllerHelpers, type: :reflex
config.include Devise::Test::IntegrationHelpers, type: :reflex

But I hit the

undefined method `env' for nil:NilClass

Which shows that @request is nil. Adding lines above should solve same issue for rspec with Capybara and testing controller.
https://stackoverflow.com/questions/27284657/undefined-method-env-for-nilnilclass-in-setup-controller-for-warden-error
https://stackoverflow.com/questions/27654786/nomethoderror-undefined-method-env-for-nilnilclass
https://stackoverflow.com/questions/21506814/nomethoderror-undefined-method-env-for-nilnilclass-in-actionmailertestcase
and more similar issues but for request or Capybara

How can I fix or mock or whatever to do for reflex? Tips are welcome, thank you.