Rails 6 system test download directory

application_system_test_case.rb

require "test_helper"

# Send downloads to tmp/capybara/downloads so they can be reliably checked and cleaned up
# without polluting ~/Downloads.
class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
  driven_by :selenium, using: :headless_chrome, screen_size: [1400, 1400] do |driver_option|
    driver_option.add_preference(
      :download,
      default_directory: Rails.root.join("tmp/capybara/downloads")
    )
  end
end