diff --git a/test/unit/i18n_test.rb b/test/unit/i18n_test.rb
index a36754e..75ea669 100644
--- a/test/unit/i18n_test.rb
+++ b/test/unit/i18n_test.rb
@@ -19,7 +19,7 @@ def test_valid_languages
   end
 
   def test_locales_validness
-    lang_files_count = Dir[Rails.root.join('plugins/redmine_privacy_terms/config/locales/*.yml')].size
+    lang_files_count = Rails.root.glob('plugins/redmine_privacy_terms/config/locales/*.yml').size
 
     assert_equal 2, lang_files_count