diff --git a/actionpack/test/controller/render_other_test.rb b/actionpack/test/controller/render_other_test.rb
index b5e74e373d..af50e11261 100644
--- a/actionpack/test/controller/render_other_test.rb
+++ b/actionpack/test/controller/render_other_test.rb
@@ -1,9 +1,5 @@
 require 'abstract_unit'
 
-ActionController.add_renderer :simon do |says, options|
-  self.content_type  = Mime::TEXT
-  self.response_body = "Simon says: #{says}"
-end
 
 class RenderOtherTest < ActionController::TestCase
   class TestController < ActionController::Base
@@ -15,7 +11,14 @@ class RenderOtherTest < ActionController::TestCase
   tests TestController
 
   def test_using_custom_render_option
+    ActionController.add_renderer :simon do |says, options|
+      self.content_type  = Mime::TEXT
+      self.response_body = "Simon says: #{says}"
+    end
+
     get :render_simon_says
     assert_equal "Simon says: foo", @response.body
+  ensure
+    ActionController.remove_renderer :simon
   end
 end