private static HybridTestVector createTestVector4() throws GeneralSecurityException {
    HpkeParameters params =
        HpkeParameters.builder()
            .setVariant(HpkeParameters.Variant.NO_PREFIX)
            .setKemId(HpkeParameters.KemId.DHKEM_P256_HKDF_SHA256)
            .setKdfId(HpkeParameters.KdfId.HKDF_SHA384)
            .setAeadId(HpkeParameters.AeadId.AES_128_GCM)
            .build();
    HpkePublicKey publicKey =
        HpkePublicKey.create(params, getP256PublicPointAsBytes(), /* idRequirement= */ null);

    HpkePrivateKey privateKey = HpkePrivateKey.create(publicKey, getPrivateP256Value());

    return new HybridTestVector(
        privateKey,
        new byte[] {0x01},
        new byte[] {0x02},
        Hex.decode(
            "0484c623788966f676b8f60bcbb80ee764abfc9b1cb1123837abd8eb4eb3a5f65c50799bb1d6ab4502e10b"
                + "76f6171288c495ffdb00f82732f05db817a4bebc63608739b27ae4d3b0263a6f155a2a7bf804"
                + "75"));
  }
Test vectors for HPKE. Generated by hand from the implementation here.
java_src/src/main/java/com/google/crypto/tink/hybrid/internal/testing/HpkeTestUtil.java