diff --git a/README.md b/README.md
index 905b361..c6b3ccb 100644
--- a/README.md
+++ b/README.md
@@ -1,43 +1,36 @@
-HedgeDoc plugin for Redmine
-===========================
+# HedgeDoc plugin for Redmine
 
 [![Rate at redmine.org](https://img.shields.io/badge/rate%20at-redmine.org-blue.svg?style=fla)](https://www.redmine.org/plugins/redmine_hedgedoc) [![Run Rubocop](https://github.com/AlphaNodes/redmine_hedgedoc/workflows/Run%20Rubocop/badge.svg)](https://github.com/AlphaNodes/redmine_hedgedoc/actions/workflows/rubocop.yml) [![Run Brakeman](https://github.com/AlphaNodes/redmine_hedgedoc/workflows/Run%20Brakeman/badge.svg)](https://github.com/AlphaNodes/redmine_hedgedoc/actions/workflows/brakeman.yml) [![Run Tests](https://github.com/AlphaNodes/redmine_hedgedoc/workflows/Tests/badge.svg)](https://github.com/AlphaNodes/redmine_hedgedoc/actions/workflows/tests.yml)
 
-Features
---------
+## Features
 
 * Show list of own [HedgeDoc](https://hedgedoc.org/) pads in [Redmine](https://www.redmine.org/)
 * Show HedgeDoc pads in [Redmine](https://www.redmine.org/) projects, if pad name has redmine identifier as prefix. Eg. MyProject: MyPad
 
-Redmine Requirements
---------------------
+## Redmine Requirements
 
 * Redmine version >= 5
 * Redmine Plugin: [additionals](https://github.com/alphanodes/additionals)
-* Ruby version >= 2.7.0
+* Ruby version >= 3.0
 
-HedgeDoc Requirements
----------------------
+## HedgeDoc Requirements
 
 * HedgeDoc version: all
 * E-Mail authentification
 
-Installation
-------------
+## Installation
 
 Install ``redmine_hedgedoc`` plugin for `Redmine`
 
     cd $REDMINE_ROOT
     git clone git://github.com/alphanodes/additionals.git plugins/additionals
     git clone git://github.com/alphanodes/redmine_hedgedoc.git plugins/redmine_hedgedoc
-    bundle install --without development test
+    bundle update --without development test
     bundle exec rake redmine:plugins:migrate RAILS_ENV=production
 
 Restart Redmine (application server) and you should see the plugin show up in the Plugins page.
 
-
-Configuration
--------------
+## Configuration
 
 Redmine needs access to [HedgeDoc](https://hedgedoc.org/) database. Add in your config/database.yml an paragraph names "hedgedoc", e.g.
 
@@ -50,8 +43,7 @@ Redmine needs access to [HedgeDoc](https://hedgedoc.org/) database. Add in your
       encoding: utf8
       schema_search_path: public
 
-Uninstall
----------
+## Uninstall
 
 Uninstall ``redmine_hedgedoc``
 
@@ -59,3 +51,23 @@ Uninstall ``redmine_hedgedoc``
     rm -rf plugins/redmine_hedgedoc
 
 Restart Redmine (application server)
+
+## License
+
+This plugin is licensed under the terms of GNU/GPL v2.
+See LICENSE for details.
+
+## Redmine Copyright
+
+The redmine_hedgedoc is a plugin extension for Redmine Project Management Software, whose Copyright follows.
+Copyright (C) 2006-  Jean-Philippe Lang
+
+Redmine is a flexible project management web application written using Ruby on Rails framework.
+More details can be found in the doc directory or on the official website <http://www.redmine.org>
+
+This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
diff --git a/test/unit/i18n_test.rb b/test/unit/i18n_test.rb
index 187520e..27003b9 100644
--- a/test/unit/i18n_test.rb
+++ b/test/unit/i18n_test.rb
@@ -19,18 +19,10 @@ def test_valid_languages
   end
 
   def test_locales_validness
-    lang_files_count = Rails.root.glob('plugins/redmine_hedgedoc/config/locales/*.yml').size
-    assert_equal lang_files_count, 2
-    valid_languages.each do |lang|
-      assert set_language_if_valid(lang)
-      case lang.to_s
-      when 'en'
-        assert_equal 'New HedgeDoc pad', l(:label_new_hedgedoc_pad)
-      when 'de'
-        assert_not l(:label_new_hedgedoc_pad) == 'New HedgeDoc pad', lang
-      end
-    end
-
-    set_language_if_valid 'en'
+    assert_locales_validness plugin: 'redmine_hedgedoc',
+                             file_cnt: 2,
+                             locales: %w[de],
+                             control_string: :label_new_hedgedoc_pad,
+                             control_english: 'New HedgeDoc pad'
   end
 end