diff --git a/app/models/dmsf_folder.rb b/app/models/dmsf_folder.rb
index 4efb59ae..f1451147 100644
--- a/app/models/dmsf_folder.rb
+++ b/app/models/dmsf_folder.rb
@@ -127,14 +127,6 @@ class DmsfFolder < ActiveRecord::Base
     end
   end
 
-  def self.find_by_title(project, folder, title)
-    if folder
-      visible.find_by(project_id: project.id, dmsf_folder_id: nil, title: title)
-    else
-      visible.find_by(project_id: project.id, dmsf_folder_id: folder.id, title: title)
-    end
-  end
-
   def delete(commit)
     if locked?
       errors[:base] << l(:error_folder_is_locked)
diff --git a/test/unit/dmsf_folder_test.rb b/test/unit/dmsf_folder_test.rb
index 257373d4..6b77dfdf 100644
--- a/test/unit/dmsf_folder_test.rb
+++ b/test/unit/dmsf_folder_test.rb
@@ -212,7 +212,7 @@ class DmsfFolderTest < RedmineDmsf::Test::UnitTest
 
   def test_copy_to
     assert @folder1.copy_to(@project2, nil)
-    assert DmsfFolder.find_by_title(@project2, nil, @folder1.title)
+    assert DmsfFolder.find_by(project_id: @project2.id, title: @folder1.title)
   end
 
 end
\ No newline at end of file