diff --git a/zuul.d/master_jobs.yaml b/zuul.d/master_jobs.yaml
index e9599bf..11a90b0 100644
--- a/zuul.d/master_jobs.yaml
+++ b/zuul.d/master_jobs.yaml
@@ -206,7 +206,11 @@
       network_available_features: *available_features
       # TODO(slaweq): remove trunks subport_connectivity test from blacklist
       # when bug https://bugs.launchpad.net/neutron/+bug/1838760 will be fixed
-      tempest_exclude_regex: "(^neutron_tempest_plugin.scenario.test_trunk.TrunkTest.test_subport_connectivity)"
+      # TODO(akatz): remove established tcp session verification test when the
+      # bug https://bugzilla.redhat.com/show_bug.cgi?id=1965036 will be fixed
+      tempest_exclude_regex: "\
+          (^neutron_tempest_plugin.scenario.test_trunk.TrunkTest.test_subport_connectivity)|\
+          (^neutron_tempest_plugin.scenario.test_security_groups.NetworkSecGroupTest.test_established_tcp_session_after_re_attachinging_sg)"
       devstack_localrc:
         Q_AGENT: openvswitch
         Q_ML2_TENANT_NETWORK_TYPE: vxlan