new_contents: """
  Plotting - Pytest Configuration
  ===============================
  
  Configures *pytest* to use the *Matplotlib* *AGG* headless backend. This allows
  the plotting unittests to run without creating windows in IDEs such as
  *VSCode*.
  """
  
  import matplotlib
  import pytest
  
  from colour.hints import Generator
  
  __author__ = "Colour Developers"
  __copyright__ = "Copyright 2013 Colour Developers"
  __license__ = "New BSD License - https://opensource.org/licenses/BSD-3-Clause"
  __maintainer__ = "Colour Developers"
  __email__ = "colour-developers@colour-science.org"
  __status__ = "Production"
  
  __all__ = [
      "mpl_headless_backend",
  ]
  
  
  @pytest.fixture(autouse=True, scope="session")
  def mpl_headless_backend() -> Generator[None, None, None]:
      """
      Configure *Matplotlib* for headless testing.
  
      This pytest fixture is automatically applied to any tests in this package
      or any subpackages at the beginning of the pytest session.
  
      Yields
      ------
      Generator
          *Matplotlib* unit tests.
      """
  
      current_backend = matplotlib.get_backend()
      matplotlib.use("AGG")
      yield
      matplotlib.use(current_backend)
  
subject: Add "conftest.py" file.