static int instantiate(RAND_DRBG *drbg, DRBG_SELFTEST_DATA *td,
                       TEST_CTX *t)
{
    if (!TEST_true(init(drbg, td, t))
            || !TEST_true(RAND_DRBG_instantiate(drbg, td->pers, td->perslen)))
        return 0;
    return 1;
}