1 files changed, 7 insertions, 0 deletions
diff --git a/actionpack/test/controller/params_wrapper_test.rb b/actionpack/test/controller/params_wrapper_test.rb
index 7bef1e8d5d..e1914cf894 100644
--- a/actionpack/test/controller/params_wrapper_test.rb
+++ b/actionpack/test/controller/params_wrapper_test.rb
@@ -180,6 +180,13 @@ class ParamsWrapperTest < ActionController::TestCase
       assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'user' => { 'username' => 'sikachu', 'title' => 'Developer' }})
     end
   end
+
+  def test_assignment_alias
+    with_default_wrapper_options do
+      UsersController.wrap_parameters = { :format => [:foo] }
+      assert_equal({ :format => [:foo], :name => "user" }, UsersController._wrapper_options)
+    end
+  end
 end
 
 class NamespacedParamsWrapperTest < ActionController::TestCase