@Test
public void testValidateCertRequestHostnamesInvalidInstanceId() {

    HashMap<String, String> attributes = new HashMap<>();
    attributes.put("sanDNS", "api.athenz.athenz.cloud,i-1234.instanceid.athenz.athenz2.cloud");
    StringBuilder id = new StringBuilder(256);
    assertFalse(InstanceUtils.validateCertRequestSanDnsNames(attributes, "athenz", "api",  "athenz.cloud", id));
}