1 files changed, 6 insertions, 0 deletions
diff --git a/actionpack/test/controller/mime_responds_test.rb b/actionpack/test/controller/mime_responds_test.rb
index 4a5e597500..26270571cf 100644
--- a/actionpack/test/controller/mime_responds_test.rb
+++ b/actionpack/test/controller/mime_responds_test.rb
@@ -498,6 +498,12 @@ class RespondToControllerTest < ActionController::TestCase
     assert_equal '<html><div id="iphone">Hello iPhone future from iPhone!</div></html>', @response.body
     assert_equal "text/html", @response.content_type
   end
+  
+  def test_invalid_format
+    get :using_defaults, :format => "invalidformat"
+    assert_equal " ", @response.body
+    assert_equal "text/html", @response.content_type
+  end
 end
 
 class RespondWithController < ActionController::Base