diff --git a/bin/tests/system/dns64/ns1/sign.sh b/bin/tests/system/dns64/ns1/sign.sh
index 14e7afeb88..348ca8af53 100644
--- a/bin/tests/system/dns64/ns1/sign.sh
+++ b/bin/tests/system/dns64/ns1/sign.sh
@@ -17,8 +17,8 @@ zone=signed
 infile=example.db
 zonefile=signed.db
 
-key1=`$KEYGEN -q -a rsasha256 $zone`
-key2=`$KEYGEN -q -a rsasha256 -fk $zone`
+key1=$($KEYGEN -q -a $DEFAULT_ALGORITHM $zone)
+key2=$($KEYGEN -q -a $DEFAULT_ALGORITHM -fk $zone)
 
 cat $infile $key1.key $key2.key > $zonefile