code: def test_invalid_tune(self, tune_setting):
      with pm.Model() as pmodel:
          pm.Normal("n", 0, 2, size=(3,))
          with pytest.raises(ValueError):
              DEMetropolisZ(tune=tune_setting)
  
imports: import warnings
  import arviz
  import numpy
  import numpy.testing
  import pytensor
  import pytest
  import pymc
  from pymc.step_methods.metropolis import BinaryGibbsMetropolis, CategoricalGibbsMetropolis, DEMetropolis, DEMetropolisZ, Metropolis, MultivariateNormalProposal, NormalProposal
  from pymc.testing import fast_unstable_sampling_mode
  from tests import sampler_fixtures
  from tests.helpers import RVsAssignmentStepsTester, StepMethodTester
  from tests.models import mv_simple, mv_simple_discrete, simple_categorical
label_desc: Use image node_id 7 for calling the TestDEMetropolisZ obj's underlying member method code with example usage: obj.test_invalid_tune(tune_setting) without return types