diff --git a/alerts_icons_filter_test.rb b/alerts_icons_filter_test.rb
new file mode 100644
index 000000000..09cd790fe
--- /dev/null
+++ b/alerts_icons_filter_test.rb
@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+# Redmine - project management software
+# Copyright (C) 2006-  Jean-Philippe Lang
+#
+# 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.
+
+require_relative '../../../../../test_helper'
+
+if Object.const_defined?(:Commonmarker)
+  require 'redmine/wiki_formatting/common_mark/alerts_icons_filter'
+  include Redmine::I18n
+
+  class Redmine::WikiFormatting::CommonMark::AlertsIconsFilterTest < ActiveSupport::TestCase
+
+    def format(markdown)
+      Redmine::WikiFormatting::CommonMark::MarkdownFilter.to_html(markdown, Redmine::WikiFormatting::CommonMark::PIPELINE_CONFIG)
+    end
+    
+    def filter(html)
+      Redmine::WikiFormatting::CommonMark::AlertsIconsFilter.to_html(html, @options)
+    end
+
+    def setup
+      @options = { }
+    end
+
+    def teardown
+      set_language_if_valid 'en'
+    end    
+
+    def test_should_render_alert_blocks_with_localized_labels
+      set_language_if_valid 'de'
+      text = <<~MD
+        > [!note]
+        > This is a note.
+      MD
+
+      html = filter(format(text))
+      puts html.inspect
+
+      expected = %r{<span class="icon-label">#{I18n.translate('label_alert_note')}</span>}
+      assert_match expected, html
+    end
+  end
+end