Not responding the object on creating unlockable requests

app/controllers/devise/unlocks_controller.rb

@@ -14,7 +14,7 @@ class Devise::UnlocksController < ApplicationController
 
     if successful_and_sane?(resource)
       set_flash_message :notice, :send_instructions if is_navigational_format?
-      respond_with resource, :location => new_session_path(resource_name)
+      respond_with({}, :location => new_session_path(resource_name))
     else
       respond_with_navigational(resource){ render_with_scope :new }
     end

test/integration/lockable_test.rb

@@ -113,7 +113,7 @@ class LockTest < ActionController::IntegrationTest
 
     post user_unlock_path(:format => 'xml'), :user => {:email => user.email}
     assert_response :success
-    assert response.body.include? %(<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<user>)
+    assert_equal response.body, {}.to_xml
     assert_equal 1, ActionMailer::Base.deliveries.size
   end