diff --git a/bin/tests/system/unknown/ns3/sign.sh b/bin/tests/system/unknown/ns3/sign.sh
index b98f94f886..7a8b097626 100644
--- a/bin/tests/system/unknown/ns3/sign.sh
+++ b/bin/tests/system/unknown/ns3/sign.sh
@@ -16,5 +16,5 @@
 zone=example
 rm -f K${zone}.+*+*.key
 rm -f K${zone}.+*+*.private
-keyname=`$KEYGEN -q -a RSASHA1 -b 1024 -n zone $zone`
-keyname=`$KEYGEN -q -a RSASHA1 -b 1024 -n zone -f KSK $zone`
+keyname=$($KEYGEN -q -a ${DEFAULT_ALGORITHM} -n zone $zone)
+keyname=$($KEYGEN -q -a ${DEFAULT_ALGORITHM} -n zone -f KSK $zone)