def test_key_ops():
    sk = SYMKey(key='df34db91c16613deba460752522d28f6ebc8a73d0d9185836270c26b',
                alg="HS256",
                key_ops=["sign", "verify"])

    _jwk = sk.serialize(private=True)
    assert set(_jwk.keys()) == {"kty", "alg", "key_ops", "k"}