diff --git a/roles/validate-tempest/vars/tempest_skip_stein.yml b/roles/validate-tempest/vars/tempest_skip_stein.yml
index 859fd58d9..1591af49d 100644
--- a/roles/validate-tempest/vars/tempest_skip_stein.yml
+++ b/roles/validate-tempest/vars/tempest_skip_stein.yml
@@ -121,6 +121,9 @@ known_failures:
   - test: 'tempest.api.object_storage.test_container_services.ContainerTest'
     reason: 'connection refused error on swift healthcheck api'
     lp: 'https://bugs.launchpad.net/tripleo/+bug/1862143'
+  - test: 'neutron_tempest_plugin.scenario.test_security_groups.NetworkSecGroupTest'
+    reason: 'timeout on test_security_groups'
+    lp: 'https://bugs.launchpad.net/tripleo/+bug/1878248'
 
   # skip list for undercloud
   - test: 'tempest.api.network.test_networks.NetworksTest.test_external_network_visibility'