code: def test_deep_equals_negative(fixture1, fixture2):
      """Tests that deep_equals correctly identifies unequal objects as unequal."""
      x = deepcopy(fixture1)
      y = deepcopy(fixture2)
  
      msg = (
          f"deep_copy incorrectly returned True when comparing "
          f"the following, different objects: x={x}, y={y}"
      )
      assert not deep_equals(x, y), msg
  
imports: from copy import deepcopy
  import numpy
  import pandas
  import pytest
  from sktime.forecasting.base import ForecastingHorizon
  from sktime.utils._testing.deep_equals import deep_equals
label_desc: Use image node_id 2 for calling a global function with example usage: test_deep_equals_negative(fixture1, fixture2) without return types