require "rack/handler/puma" module ActionDispatch module SystemTesting class Server # :nodoc: def run register setup end private def register Capybara.register_server :rails_puma do |app, port, host| Rack::Handler::Puma.run(app, Port: port, Threads: "0:1") end end def setup set_server set_port end def set_server Capybara.server = :rails_puma end def set_port Capybara.always_include_port = true end end end end