code: def test_save_I(tmp_path):
      # Test saving something that would trigger the auto-convert to 'L'
  
      im = hopper("I")
  
      out = str(tmp_path / "temp.gif")
      im.save(out)
  
      with Image.open(out) as reloaded:
          assert_image_equal(reloaded.convert("L"), im.convert("L"))
  
imports: from io import BytesIO
  import pytest
  from PIL import GifImagePlugin, Image, ImageDraw, ImagePalette, features
  from .helper import assert_image_equal, assert_image_equal_tofile, assert_image_similar, hopper, is_pypy, netpbm_available
label_desc: Use image node_id 56 for calling a global function with example usage: test_save_I(tmp_path) without return types