diff --git a/tests/scripts/expect/tun-realm-local-multicast.exp b/tests/scripts/expect/tun-realm-local-multicast.exp
index 6173a4691..2e629a7fc 100755
--- a/tests/scripts/expect/tun-realm-local-multicast.exp
+++ b/tests/scripts/expect/tun-realm-local-multicast.exp
@@ -113,6 +113,7 @@ wait_for "state" "child"
 set mleid4 [get_mleid]
 
 switch_node 1
+sleep 10
 
 send "ping ${mleid4}\n"
 expect "Done"