# File lib/spring/test/acceptance_test.rb, line 62
      def assert_speedup(ratio = DEFAULT_SPEEDUP)
        if ENV['CI']
          yield
        else
          app.with_timing do
            yield
            assert app.timing_ratio < ratio, "#{app.last_time} was not less than #{ratio} of #{app.first_time}"
          end
        end
      end