code: def before_test(self, test_name):
      # TODO(crcrpar): Remove this relaxation when
      # a known issue in the reduction of ChainerX is resolved.
      if test_name == "test_forward":
          if (
              self.x_dtype == numpy.float16
              and self.W_dtype == numpy.float16
              and self.n_batch_axes == 3
              and self.backend_config.use_chainerx
              and self.backend_config.chainerx_device == "native:0"
          ):
              self.check_forward_options["atol"] = 5e-3
  
imports: import unittest
  import numpy
  import pytest
  import chainer
  from chainer import functions
  from chainer import testing
  from chainer.testing import backend
label_desc: Use image node_id 2 for calling the TestNonparameterizedLinear obj's underlying member method code with example usage: obj.before_test(test_name) without return types