def METHOD_NAME(self):
    r"""Test the R ratio with presence of wilson coefficients set to zero"""
    wc_obj = flavio.WilsonCoefficients()
    R = ppll.R_sigma_qqll_int(13e3**2, 1300, 1800, 'mu', wc_obj, par)
    self.assertEqual(R, 1,msg=f'SM prediction for R ratio: {R} (has to be 1)')