diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index 3565d8b481254d..c4bb390933d6f8 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -3014,6 +3014,7 @@ fullmesh_tests()
 	if reset "fullmesh test 1x1"; then
 		pm_nl_set_limits $ns1 1 3
 		pm_nl_set_limits $ns2 1 3
+		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,fullmesh
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
 		fullmesh=1 speed=slow \
 			run_tests $ns1 $ns2 10.0.1.1