def METHOD_NAME(self):
    tt = self.res.t_test(np.eye(len(self.res.params)))
    from scipy import stats
    pvalue = stats.norm.sf(np.abs(tt.tvalue)) * 2
    assert_almost_equal(tt.tvalue, self.res.tvalues, DEC)
    assert_almost_equal(pvalue, self.res.pvalues, DEC)