@Test(groups = TCKConstants.TEST_GROUP_UTILS, description = "Illustrate validation of a JWT",
        expectedExceptions = {InvalidJwtException.class})

public void testSignedByECKeyVerifiedByRSKey() throws Exception {
    String token = TokenUtils.signClaims("/Token1.json", SignatureAlgorithm.ES256);
    validateToken(token, SignatureAlgorithm.RS256, null);
}