diff --git a/actionpack/lib/action_controller/assertions.rb b/actionpack/lib/action_controller/assertions.rb
index 2402e0941b4885cd8b4aa45a334ab299e4b3cd5f..3fc65d5bd9f6268ce4b759a3b1db940c36373053 100644
--- a/actionpack/lib/action_controller/assertions.rb
+++ b/actionpack/lib/action_controller/assertions.rb
@@ -85,8 +85,8 @@ def assert_redirected_to(options = {}, message=nil)
             assert_equal(eurl, url, msg) if eurl && url
             assert_equal(epath, path, msg) if epath && path 
           else
-            @response_diff = options.diff(@response.redirected_to) if @response.redirected_to
-            msg = build_message(message, "response is not a redirection to all of the options supplied (redirection is <?>), difference: <?>", 
+            @response_diff = options.diff(@response.redirected_to) if options.is_a?(Hash) && @response.redirected_to.is_a?(Hash)
+            msg = build_message(message, "response is not a redirection to all of the options supplied (redirection is <?>)#{', difference: <?>' if @response_diff}", 
                                 @response.redirected_to || @response.redirect_url, @response_diff)
 
             assert_block(msg) do
diff --git a/actionpack/test/controller/test_test.rb b/actionpack/test/controller/test_test.rb
index 06a2ce3eb78c5a20711f245f47e69ce753bbebab..88e0c159a71c0f9a81d244297ce0d732e995745c 100644
--- a/actionpack/test/controller/test_test.rb
+++ b/actionpack/test/controller/test_test.rb
@@ -7,7 +7,7 @@ def set_flash
       flash["test"] = ">#{flash["test"]}<"
       render :text => 'ignore me'
     end
-    
+
     def render_raw_post
       raise Test::Unit::AssertionFailedError, "#raw_post is blank" if request.raw_post.blank?
       render :text => request.raw_post
@@ -54,9 +54,19 @@ def test_file_upload
       render :text => params[:file].size
     end
 
-    def rescue_action(e)
-      raise e
+    def redirect_to_symbol
+      redirect_to :generate_url, :id => 5
     end
+
+    private
+    
+      def rescue_action(e)
+        raise e
+      end
+
+      def generate_url(opts)
+        url_for(opts.merge(:action => "test_uri"))
+      end
   end
 
   def setup
@@ -393,4 +403,9 @@ def test_fixture_file_upload
   def test_test_uploaded_file_exception_when_file_doesnt_exist
     assert_raise(RuntimeError) { ActionController::TestUploadedFile.new('non_existent_file') }
   end
+
+  def test_assert_redirected_to_symbol
+    get :redirect_to_symbol
+    assert_redirected_to :generate_url
+  end
 end