old_contents: #!/usr/bin/env python3
  
  def configuration(parent_package='',top_path=None):
      from numpy.distutils.misc_util import Configuration
      config = Configuration('testing', parent_package, top_path)
  
      config.add_subpackage('_private')
      config.add_subpackage('tests')
      config.add_data_files('*.pyi')
      return config
  
  if __name__ == '__main__':
      from numpy.distutils.core import setup
      setup(maintainer="NumPy Developers",
            maintainer_email="numpy-dev@numpy.org",
            description="NumPy test module",
            url="https://www.numpy.org",
            license="NumPy License (BSD Style)",
            configuration=configuration,
            )
  
new_contents: #!/usr/bin/env python3
  
  def configuration(parent_package='',top_path=None):
      from numpy.distutils.misc_util import Configuration
      config = Configuration('testing', parent_package, top_path)
  
      config.add_subpackage('_private')
      config.add_subpackage('tests')
      config.add_data_files('*.pyi')
      config.add_data_files('_private/*.pyi')
      return config
  
  if __name__ == '__main__':
      from numpy.distutils.core import setup
      setup(maintainer="NumPy Developers",
            maintainer_email="numpy-dev@numpy.org",
            description="NumPy test module",
            url="https://www.numpy.org",
            license="NumPy License (BSD Style)",
            configuration=configuration,
            )
  
subject: Add support for *.pyi data-files to `np.testing._private`