diff --git a/lib/models.rb b/lib/models.rb
index a676f901f..d2f9d2761 100644
--- a/lib/models.rb
+++ b/lib/models.rb
@@ -81,7 +81,7 @@ returns
     list.each {|model_class, model_attributes|
       references[:model][model_class.to_s] = 0
       next if !model_attributes[:attributes]
-      ['created_by_id', 'updated_by_id'].each {|item|
+      %w(created_by_id updated_by_id).each {|item|
         if model_attributes[:attributes].include?(item)
           count = model_class.where("#{item} = ?", object_id).count
           next if count == 0
diff --git a/test/unit/model_test.rb b/test/unit/model_test.rb
index 6af3d2517..8ec188acf 100644
--- a/test/unit/model_test.rb
+++ b/test/unit/model_test.rb
@@ -6,7 +6,7 @@ class ModelTest < ActiveSupport::TestCase
 
       # create base
       groups = Group.where( name: 'Users' )
-      roles  = Role.where( name: ['Agent', 'Admin'] )
+      roles  = Role.where( name: %w(Agent Admin) )
       agent1 = User.create_or_update(
         login: 'model-agent1@example.com',
         firstname: 'Model',