diff --git a/test/knot-data/knot.conf b/test/knot-data/knot.conf
index b8b9e7925dc..6d177d72859 100644
--- a/test/knot-data/knot.conf
+++ b/test/knot-data/knot.conf
@@ -60,6 +60,7 @@ policy:
       ksk-submission: parent_zone_sbm
       nsec3-iterations: 0
       nsec3: on
+      nsec3-salt-length: 8
       propagation-delay: 1s
       signing-threads: 4
       zone-max-ttl: 1s