Setting default_url_options in test environment doesn't seem to work

Nowadays you can just set them in your test.rb like so:

Rails.application.routes.default_url_options[:host]= 'localhost:3000' 

Rails.application.routes.default_url_options[:host]= 'localhost:3000'

In the developemnt.rb / test.rb, can be more concise as following:

Rails.application.configure do
  # ... other config ...

  routes.default_url_options[:host] = 'localhost:3000'
end