code: def test_invalid_file(self):
      invalid_file = "Tests/images/flower.jpg"
  
      with pytest.raises(SyntaxError):
          TiffImagePlugin.TiffImageFile(invalid_file)
  
      TiffImagePlugin.PREFIXES.append(b"\xff\xd8\xff\xe0")
      with pytest.raises(SyntaxError):
          TiffImagePlugin.TiffImageFile(invalid_file)
      TiffImagePlugin.PREFIXES.pop()
  
imports: import os
  from io import BytesIO
  import pytest
  from PIL import Image, ImageFile, TiffImagePlugin
  from PIL.TiffImagePlugin import RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION
  from .helper import assert_image_equal, assert_image_equal_tofile, assert_image_similar, assert_image_similar_tofile, hopper, is_pypy, is_win32
label_desc: Use image node_id 14 for calling the TestFileTiff obj's underlying member method code with example usage: obj.test_invalid_file() without return types