diff --git a/bin/tests/system/inline/ns5/named.conf.post b/bin/tests/system/inline/ns5/named.conf.post
index d582b46670..17d5dd57ec 100644
--- a/bin/tests/system/inline/ns5/named.conf.post
+++ b/bin/tests/system/inline/ns5/named.conf.post
@@ -27,6 +27,7 @@ options {
 	pid-file "named.pid";
 	listen-on { 10.53.0.5; };
 	listen-on-v6 { none; };
+	dnssec-validation no;
 	recursion no;
 	notify yes;
 	notify-delay 0;
diff --git a/bin/tests/system/inline/ns5/named.conf.pre b/bin/tests/system/inline/ns5/named.conf.pre
index 2018289634..a3ea6f2a8f 100644
--- a/bin/tests/system/inline/ns5/named.conf.pre
+++ b/bin/tests/system/inline/ns5/named.conf.pre
@@ -27,6 +27,7 @@ options {
 	pid-file "named.pid";
 	listen-on { 10.53.0.5; };
 	listen-on-v6 { none; };
+	dnssec-validation no;
 	recursion no;
 	notify yes;
 	notify-delay 0;
diff --git a/bin/tests/system/inline/ns7/named.conf.in b/bin/tests/system/inline/ns7/named.conf.in
index b446066a36..3415ba595d 100644
--- a/bin/tests/system/inline/ns7/named.conf.in
+++ b/bin/tests/system/inline/ns7/named.conf.in
@@ -41,6 +41,7 @@ options {
 	pid-file "named.pid";
 	listen-on { 10.53.0.7; };
 	listen-on-v6 { none; };
+	dnssec-validation no;
 	recursion no;
 	notify no;
 	try-tcp-refresh no;