 
       true ->
         modules = ExUnit.Server.take_sync_modules()
-        loop(config, modules, running, async_once? and System.monotonic_time())
+        loop(config, modules, running, async_once?)
     end
   end
 

    end

    async_us =
      if async_stop_time do
        System.convert_time_unit(async_stop_time - start_time, :native, :microsecond)
      end

    run_us = System.convert_time_unit(stop_time - start_time, :native, :microsecond)
    times_us = %{async: async_us, load: load_us, run: run_us}


      # So we can start all sync modules
      [head | tail] ->
        spawn_modules(config, [head], tail, running, async_stop_time(async_stop_time))

      # No more modules, we are done!
      [] ->
        async_stop_time(async_stop_time)
    end
  end

  defp async_stop_time(false = _async_once?), do: nil
  defp async_stop_time(true = _async_once?), do: System.monotonic_time()
  defp async_stop_time(async_stop_time), do: async_stop_time

  # Loop expecting down messages from the spawned modules.
  #
