KerberosTicket ticket = new KerberosTicket(validToken, (byte) 0, keys);
            assertNotNull(ticket);
        }
    }

    @Test
    void testConstructorWithKeyNotFound() throws IOException {
        // Test when no suitable Kerberos key is found
        byte[] token = createTestTicketBytes(new BigInteger(KerberosConstants.KERBEROS_VERSION), SERVER_REALM, SERVER_PRINCIPAL_NAME,