diff --git a/bin/tests/system/catz/ns1/named.conf.in b/bin/tests/system/catz/ns1/named.conf.in
index 29a4a3094b..caa7b2c162 100644
--- a/bin/tests/system/catz/ns1/named.conf.in
+++ b/bin/tests/system/catz/ns1/named.conf.in
@@ -134,7 +134,7 @@ view "ch" ch {
 
 key tsig_key. {
 	secret "LSAnCU+Z";
-	algorithm hmac-md5;
+	algorithm @DEFAULT_HMAC@;
 };
 
 key next_key. {
diff --git a/bin/tests/system/catz/ns2/named1.conf.in b/bin/tests/system/catz/ns2/named1.conf.in
index 23383ed987..5a7babdbfe 100644
--- a/bin/tests/system/catz/ns2/named1.conf.in
+++ b/bin/tests/system/catz/ns2/named1.conf.in
@@ -165,7 +165,7 @@ view "ch" ch {
 
 key tsig_key. {
 	secret "LSAnCU+Z";
-	algorithm hmac-md5;
+	algorithm @DEFAULT_HMAC@;
 };
 
 key next_key. {
diff --git a/bin/tests/system/catz/ns2/named2.conf.in b/bin/tests/system/catz/ns2/named2.conf.in
index 62b76a600e..cd5f2b97c7 100644
--- a/bin/tests/system/catz/ns2/named2.conf.in
+++ b/bin/tests/system/catz/ns2/named2.conf.in
@@ -122,5 +122,5 @@ view "ch" ch {
 
 key tsig_key. {
 	secret "LSAnCU+Z";
-	algorithm hmac-md5;
+	algorithm @DEFAULT_HMAC@;
 };