old_contents: import os
  import shutil
  
  import pytest
  
  
  data_files = [
      'boxes_15x15.data',
  ]
  
  
  @pytest.yield_fixture(autouse=True)
  def temporary_working_directory(tmpdir):
      for filename in data_files:
          filename = os.path.join(os.path.dirname(__file__), filename)
          shutil.copy(filename, str(tmpdir))
      with tmpdir.as_cwd():
          yield
  
new_contents: import os
  import shutil
  
  import pytest
  
  
  data_files = [
      'boxes_15x15.data',
  ]
  
  
  @pytest.fixture(autouse=True)
  def temporary_working_directory(tmpdir):
      for filename in data_files:
          filename = os.path.join(os.path.dirname(__file__), filename)
          shutil.copy(filename, str(tmpdir))
      with tmpdir.as_cwd():
          yield
  
subject: update deprecated fixture (#208)