old_contents: from nose.plugins import attrib
  
  gpu = attrib.attr('gpu')
  cudnn = attrib.attr('gpu', 'cudnn')
  
  
  def multi_gpu(gpu_num):
      return attrib.attr(gpu=gpu_num)
  
new_contents: from nose.plugins import attrib
  
  gpu = attrib.attr('gpu')
  cudnn = attrib.attr('gpu', 'cudnn')
  slow = attrib.attr('slow')
  
  
  def multi_gpu(gpu_num):
      return attrib.attr(gpu=gpu_num)
  
subject: Make slow attribute to specify slow tests