}
    }

    @Test
    void testHMACT64WithActualMD5AndDifferentData() throws NoSuchAlgorithmException {
        byte[] key = "key".getBytes();
        byte[] data = "The quick brown fox jumps over the lazy dog".getBytes();

        // Calculate expected HMAC-MD5 using standard Java MessageDigest for comparison
        // This is a simplified HMAC-MD5 calculation for comparison, not a full RFC 2104 implementation.