code: def before_test(self, test_name):
      # Some of the test configurations do not
      # support autotune so this hack is necessary
      # for the CI to work
      self.backend_config.autotune = self.autotune
      # cuDNN 5 and 5.1 results suffer from precision issues
      using_old_cudnn = (
          self.backend_config.xp is cuda.cupy
          and self.backend_config.use_cudnn == "always"
          and cuda.cuda.cudnn.getVersion() < 6000
      )
      if using_old_cudnn:
          self.check_backward_options.update(
              {"atol": 1e-3, "rtol": 1e-3}
          )
          self.check_double_backward_options.update(
              {"atol": 1e-2, "rtol": 1e-2}
          )
  
imports: import functools
  from operator import mul
  import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  import chainer.functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import conv
label_desc: Use image node_id 2 for calling the TestConvolutionND obj's underlying member method code with example usage: obj.before_test(test_name) without return types