$ mvn test -Dtest=KeyStoresTestCase -pl elytron
...
[INFO] Running org.wildfly.extension.elytron.KeyStoresTestCase
[ERROR] Tests run: 27, Failures: 2, Errors: 0, Skipped: 0, Time elapsed: 23.836 s <<< FAILURE! - in org.wildfly.extension.elytron.KeyStoresTestCase
[ERROR] testObtainCertificateWithECPublicKey(org.wildfly.extension.elytron.KeyStoresTestCase)  Time elapsed: 2.263 s  <<< FAILURE!
java.lang.AssertionError: 
{
    "outcome" : "failed",
    "failure-description" : "WFLYCTL0158: Operation handler failed: java.lang.RuntimeException: org.wildfly.security.x500.cert.acme.AcmeException: ELY10049: Unable to download certificate chain from ACME server",
    "rolled-back" : true
}
	at org.wildfly.extension.elytron.KeyStoresTestCase.assertSuccess(KeyStoresTestCase.java:170)
	at org.wildfly.extension.elytron.KeyStoresTestCase.obtainCertificate(KeyStoresTestCase.java:1043)
	at org.wildfly.extension.elytron.KeyStoresTestCase.testObtainCertificateWithECPublicKey(KeyStoresTestCase.java:1004)

[ERROR] testObtainCertificateWithKeySize(org.wildfly.extension.elytron.KeyStoresTestCase)  Time elapsed: 2.87 s  <<< FAILURE!
java.lang.AssertionError: 
{
    "outcome" : "failed",
    "failure-description" : "WFLYCTL0158: Operation handler failed: java.lang.RuntimeException: org.wildfly.security.x500.cert.acme.AcmeException: ELY10049: Unable to download certificate chain from ACME server",
    "rolled-back" : true
}
	at org.wildfly.extension.elytron.KeyStoresTestCase.assertSuccess(KeyStoresTestCase.java:170)
	at org.wildfly.extension.elytron.KeyStoresTestCase.obtainCertificate(KeyStoresTestCase.java:1043)
	at org.wildfly.extension.elytron.KeyStoresTestCase.testObtainCertificateWithKeySize(KeyStoresTestCase.java:990)

[INFO] 
[INFO] Results:
[INFO] 
[ERROR] Failures: 
[ERROR]   KeyStoresTestCase.testObtainCertificateWithECPublicKey:1004->obtainCertificate:1043->assertSuccess:170 {
    "outcome" : "failed",
    "failure-description" : "WFLYCTL0158: Operation handler failed: java.lang.RuntimeException: org.wildfly.security.x500.cert.acme.AcmeException: ELY10049: Unable to download certificate chain from ACME server",
    "rolled-back" : true
}
[ERROR]   KeyStoresTestCase.testObtainCertificateWithKeySize:990->obtainCertificate:1043->assertSuccess:170 {
    "outcome" : "failed",
    "failure-description" : "WFLYCTL0158: Operation handler failed: java.lang.RuntimeException: org.wildfly.security.x500.cert.acme.AcmeException: ELY10049: Unable to download certificate chain from ACME server",
    "rolled-back" : true
}
[INFO] 
[ERROR] Tests run: 27, Failures: 2, Errors: 0, Skipped: 0