diff --git a/actionpack/lib/action_controller/test_process.rb b/actionpack/lib/action_controller/test_process.rb
index 851494a89c60f5220ce9713c77697d6134b2ecc8..40d46661d8b3afb59aed98ea2c11a414b9c6573e 100644
--- a/actionpack/lib/action_controller/test_process.rb
+++ b/actionpack/lib/action_controller/test_process.rb
@@ -125,7 +125,8 @@ class TestResponse < AbstractResponse #:nodoc:
     def response_code
       headers['Status'][0,3].to_i rescue 0
     end
-
+    
+    # returns a String to ensure compatibility with Net::HTTPResponse
     def code
       headers['Status'].to_s.split(' ')[0]
     end