class Capybara::RackTest::Form

def merge_param!(params, key, value)
  if Rack::Utils.respond_to?(:default_query_parser)
    Rack::Utils.default_query_parser.normalize_params(params, key, value, Rack::Utils.param_depth_limit)
  else
    Rack::Utils.normalize_params(params, key, value)
  end
end