diff -r 2c562c125e29 vendor/plugins/shoulda/lib/shoulda/active_record_helpers.rb
--- a/vendor/plugins/shoulda/lib/shoulda/active_record_helpers.rb	Sun Mar 09 23:06:39 2008 -0500
+++ b/vendor/plugins/shoulda/lib/shoulda/active_record_helpers.rb	Sun Mar 09 23:37:56 2008 -0500
@@ -101,9 +101,13 @@ module ThoughtBot # :nodoc:
         attributes.each do |attribute|
           attribute = attribute.to_sym
           should "protect #{attribute} from mass updates" do
-            protected = klass.protected_attributes
-            assert protected.include?(attribute.to_s), 
-                   "#{klass} is protecting #{protected.to_a.to_sentence}, but not #{attribute}."
+            protected = klass.protected_attributes || []
+            accessible = klass.accessible_attributes || []
+            
+            assert protected.include?(attribute.to_s) || !accessible.include?(attribute.to_s), 
+                   (accessible.empty? ? 
+                     "#{klass} is protecting #{protected.to_a.to_sentence}, but not #{attribute}." :
+                     "#{klass} has made #{attribute} accessible")
           end
         end
       end