diff --git a/railties/test/railties/engine_test.rb b/railties/test/railties/engine_test.rb
index c4b18e9ea5..28e5b2ff1e 100644
--- a/railties/test/railties/engine_test.rb
+++ b/railties/test/railties/engine_test.rb
@@ -592,11 +592,15 @@ YAML
       @plugin.write "app/models/bukkits/post.rb", <<-RUBY
         module Bukkits
           class Post
-            extend ActiveModel::Naming
+            include ActiveModel::Model
 
             def to_param
               "1"
             end
+
+            def persisted?
+              true
+            end
           end
         end
       RUBY
@@ -704,8 +708,7 @@ YAML
       @plugin.write "app/models/bukkits/post.rb", <<-RUBY
         module Bukkits
           class Post
-            extend ActiveModel::Naming
-            include ActiveModel::Conversion
+            include ActiveModel::Model
             attr_accessor :title
 
             def to_param