def METHOD_NAME(self):
    # set up
    wanted_global = [[-4.0 / 6], [-1.0 / 6], [3.0 / 6], [-1.0 / 6], [-7.0 / 6]]
    for i, vals in enumerate(self.base_wanted):
        wanted_global[i].extend(vals)
    # run
    iface.SignalExtraction(
        in_file=self.filenames["in_file"],
        label_files=self.filenames["label_files"],
        class_labels=self.labels,
        include_global=True,
        incl_shared_variance=False,
    ).run()
    # assert
    self.assert_expected_output(self.global_labels, wanted_global)