Run invoice spec as feature spec

spec/system/admin/invoice_print_spec.rb

@@ -5,7 +5,7 @@ require "system_helper"
 describe '
     As an administrator
     I want to print a invoice as PDF
-', js: false do
+', type: :feature, js: false do
   include WebHelper
   include AuthenticationHelper
 

spec/system/support/cuprite_setup.rb

@@ -22,7 +22,7 @@ Capybara.register_driver(:cuprite) do |app|
 end
 
 # Configure Capybara to use :cuprite driver by default
-Capybara.default_driver = Capybara.javascript_driver = :cuprite
+Capybara.javascript_driver = :cuprite
 
 RSpec.configure do |config|
   config.include CupriteHelpers, type: :system