diff --git a/zuul.d/tempest-multinode.yaml b/zuul.d/tempest-multinode.yaml
index f7d3cec3bb6..aec6e5ebbbf 100644
--- a/zuul.d/tempest-multinode.yaml
+++ b/zuul.d/tempest-multinode.yaml
@@ -212,7 +212,16 @@
       # tempest.scenario.test_network_v6.TestGettingAddress module from
       # blacklist when bug https://bugs.launchpad.net/neutron/+bug/1863577 will
       # be fixed
+      # TODO(mjozefcz): The test test_port_security_macspoofing_port
+      # and related bug https://bugs.launchpad.net/tempest/+bug/1728886
+      # are fixed in Core-OVN, but tempest-slow job uses stable release of
+      # core OVN now and thats why it is still failing in this job.
+      # Remove this blacklist when OVN 20.06 will be releaseed and consumed.
+      # In addition: on next PTG we will discuss the rules of running specific
+      # jobs with OVN master and OVN release branches. Please consider
+      # specyfing explicitely the version of OVN in tempest-slow jobs.
       tempest_black_regex: "\
+          (?:tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_port_security_macspoofing_port)|\
           (^tempest.scenario.test_network_v6.TestGettingAddress)"