diff --git a/tools/testing/selftests/net/fcnal-test.sh b/tools/testing/selftests/net/fcnal-test.sh
index d2ac09b35dcf..e3657454816b 100755
--- a/tools/testing/selftests/net/fcnal-test.sh
+++ b/tools/testing/selftests/net/fcnal-test.sh
@@ -376,6 +376,8 @@ create_ns()
 	ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.keep_addr_on_down=1
 	ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.forwarding=1
 	ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.forwarding=1
+	ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.accept_dad=0
+	ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.accept_dad=0
 }
 
 # create veth pair to connect namespaces and apply addresses.