code: def test_ifd_signed_long(tmp_path):
      im = hopper()
      info = TiffImagePlugin.ImageFileDirectory_v2()
  
      info[37000] = -60000
  
      out = str(tmp_path / "temp.tiff")
      im.save(out, tiffinfo=info, compression="raw")
  
      with Image.open(out) as reloaded:
          assert reloaded.tag_v2[37000] == -60000
  
imports: import io
  import struct
  import pytest
  from PIL import Image, TiffImagePlugin, TiffTags
  from PIL.TiffImagePlugin import IFDRational
  from .helper import assert_deep_equal, hopper
label_desc: Use image node_id 16 for calling a global function with example usage: test_ifd_signed_long(tmp_path) without return types