old_contents: """Package for regression testing of the blender nif scripts."""
  
  import bpy
  
  def setup(self):
      """Enables the nif scripts addon, so all tests can use it."""
      bpy.ops.wm.addon_enable(module="io_scene_nif")
  
  def teardown(self):
      """Disables the nif scripts addon."""
      bpy.ops.wm.addon_disable(module="io_scene_nif")
  
new_contents: """Package for regression testing of the blender nif scripts."""
  
  import bpy
  
  def setup(self):
      """Enables the nif scripts addon, so all tests can use it."""
      bpy.ops.wm.addon_enable(module="io_scene_nif")
      # remove default objects
      for obj in bpy.data.objects[:]:
          bpy.context.scene.objects.unlink(obj)
          bpy.data.objects.remove(obj)
  
  def teardown(self):
      """Disables the nif scripts addon."""
      bpy.ops.wm.addon_disable(module="io_scene_nif")
  
subject: Remove startup objects when setting up the test module.