diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 386de908b..82c105443 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -281,7 +281,6 @@ Layout/SpaceInsideArrayLiteralBrackets:
     - 'app/models/query.rb'
     - 'lib/diff.rb'
     - 'lib/redmine/i18n.rb'
-    - 'test/mocks/open_id_authentication_mock.rb'
     - 'test/unit/mailer_localisation_test.rb'
     - 'test/unit/mailer_test.rb'
     - 'test/unit/search_test.rb'
diff --git a/test/mocks/open_id_authentication_mock.rb b/test/mocks/open_id_authentication_mock.rb
index dcc8ed441..a6d5cd030 100644
--- a/test/mocks/open_id_authentication_mock.rb
+++ b/test/mocks/open_id_authentication_mock.rb
@@ -43,7 +43,7 @@ module OpenIdAuthentication
   private
 
   def add_simple_registration_fields(open_id_response, fields)
-      open_id_response.add_extension_arg('sreg', 'required', [ fields[:required] ].flatten * ',') if fields[:required]
-      open_id_response.add_extension_arg('sreg', 'optional', [ fields[:optional] ].flatten * ',') if fields[:optional]
+      open_id_response.add_extension_arg('sreg', 'required', [fields[:required]].flatten * ',') if fields[:required]
+      open_id_response.add_extension_arg('sreg', 'optional', [fields[:optional]].flatten * ',') if fields[:optional]
   end
 end