diff --git a/bin/tests/system/checkzone/tests.sh b/bin/tests/system/checkzone/tests.sh
index 8bab669a50..c9614a4b65 100644
--- a/bin/tests/system/checkzone/tests.sh
+++ b/bin/tests/system/checkzone/tests.sh
@@ -37,7 +37,7 @@ do
 	echo_i "checking $db ($n)"
 	ret=0 v=0
 	case $db in
-	zones/bad-dns-sd-reverse.db)
+	zones/bad-dns-sd-reverse.db|zones/bad-svcb-servername.db)
 		$CHECKZONE -k fail -i local 0.0.0.0.in-addr.arpa $db > test.out.$n 2>&1 || v=$?
 		;;
 	*)
diff --git a/bin/tests/system/checkzone/zones/bad-svcb-servername.db b/bin/tests/system/checkzone/zones/bad-svcb-servername.db
new file mode 100644
index 0000000000..91fc2dfe32
--- /dev/null
+++ b/bin/tests/system/checkzone/zones/bad-svcb-servername.db
@@ -0,0 +1,15 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0. If a copy of the MPL was not distributed with this
+; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 600
+@		SOA	ns hostmaster 2011012708 3600 1200 604800 1200
+		NS	ns
+ns		A	192.0.2.1
+
+svcb		SVCB	1 _underscore.example. port=60 alpn=h3 ech="ZWFzdGVyIGVnZyE="
diff --git a/bin/tests/system/checkzone/zones/good-svcb.db b/bin/tests/system/checkzone/zones/good-svcb.db
index e94916402c..8b1e4f8a01 100644
--- a/bin/tests/system/checkzone/zones/good-svcb.db
+++ b/bin/tests/system/checkzone/zones/good-svcb.db
@@ -21,3 +21,4 @@ svcb5		SVCB	5 . key9999="something"
 svcb6		SVCB	6 . mandatory=port,alpn port=60 alpn=h3
 svcb7		SVCB	7 . mandatory=port,alpn port=60 alpn=h1,h3
 svcb8		SVCB	8 . mandatory=port,alpn port=60 alpn="h1\\,h2,h3"
+svcb9		SVCB	0 44._svbc.example.net.