This is a quick one. I had to populate a test database with models with attributes translated with Globalize3. There are validations that fail if those attributes are not set before saving the record. This is the correct code:
record = Factory.build(:model) I18n.available_locales.each do |locale| Globalize.with_locale(locale) do record.attribute = "Model_attribute_#{locale} #{n}" end end model.save