diff --git a/app/models/article.rb b/app/models/article.rb
index 7187ba2..c086adf 100644
--- a/app/models/article.rb
+++ b/app/models/article.rb
@@ -417,6 +417,7 @@ class Article < ActiveRecord::Base
     :profile_id,
     :parent_id,
     :path,
+    :slug,
     :updated_at,
     :created_at,
     :last_changed_by_id,
diff --git a/test/unit/approve_article_test.rb b/test/unit/approve_article_test.rb
index 6e9d8d8..f5b7c07 100644
--- a/test/unit/approve_article_test.rb
+++ b/test/unit/approve_article_test.rb
@@ -378,4 +378,31 @@ class ApproveArticleTest < ActiveSupport::TestCase
     end
   end
 
+  should 'approve same article twice changing its name' do
+    task1 = ApproveArticle.create!(:article => article, :target => community, :requestor => profile)
+    assert_difference article.class, :count do
+      task1.finish
+    end
+    task2 = ApproveArticle.create!(:name => article.name + ' v2', :article => article, :target => community, :requestor => profile)
+    assert_difference article.class, :count do
+      assert_nothing_raised ActiveRecord::RecordInvalid do
+         task2.finish
+      end
+    end
+  end
+
+  should 'not approve same article twice if not changing its name' do
+    task1 = ApproveArticle.create!(:article => article, :target => community, :requestor => profile)
+    assert_difference article.class, :count do
+      task1.finish
+    end
+    task2 = ApproveArticle.create!(:article => article, :target => community, :requestor => profile)
+    assert_no_difference article.class, :count do
+      assert_raises ActiveRecord::RecordInvalid do
+         task2.finish
+      end
+    end
+  end
+
+
 end
diff --git a/test/unit/article_test.rb b/test/unit/article_test.rb
index 2544acb..e5b2611 100644
--- a/test/unit/article_test.rb
+++ b/test/unit/article_test.rb
@@ -576,10 +576,10 @@ class ArticleTest < Test::Unit::TestCase
     assert_kind_of Folder, b
   end
 
-  should 'copy slug' do
+  should 'not copy slug' do
     a = fast_create(Article, :slug => 'slug123')
     b = a.copy({})
-    assert_equal a.slug, b.slug
+    assert a.slug != b.slug
   end
 
   should 'load article under an old path' do
--
libgit2 0.21.2