diff --git a/tools/testing/selftests/net/hsr/hsr_redbox.sh b/tools/testing/selftests/net/hsr/hsr_redbox.sh
index 52e0412c32e6..db69be95ecb3 100755
--- a/tools/testing/selftests/net/hsr/hsr_redbox.sh
+++ b/tools/testing/selftests/net/hsr/hsr_redbox.sh
@@ -86,6 +86,8 @@ setup_hsr_interfaces()
 check_prerequisites
 setup_ns ns1 ns2 ns3
 
+trap cleanup_all_ns EXIT
+
 setup_hsr_interfaces 1
 do_complete_ping_test