diff --git a/zuul.d/master_jobs.yaml b/zuul.d/master_jobs.yaml
index 728eed8..072c8b4 100644
--- a/zuul.d/master_jobs.yaml
+++ b/zuul.d/master_jobs.yaml
@@ -196,9 +196,12 @@
       # TODO(slaweq): Remove test_trunk_subport_lifecycle test from the
       # blacklist when bug https://bugs.launchpad.net/neutron/+bug/1885900 will
       # be fixed
+      # TODO(jlibosva): Remove the NetworkWritableMtuTest test from the list
+      # once east/west fragmentation is supported in core OVN
       tempest_black_regex: "\
           (?:neutron_tempest_plugin.scenario.test_ipv6.IPv6Test)|\
-          (^neutron_tempest_plugin.scenario.test_trunk.TrunkTest.test_trunk_subport_lifecycle)"
+          (^neutron_tempest_plugin.scenario.test_trunk.TrunkTest.test_trunk_subport_lifecycle)|\
+          (^neutron_tempest_plugin.scenario.test_mtu.NetworkWritableMtuTest)"
       devstack_localrc:
         Q_AGENT: ovn
         NETWORK_API_EXTENSIONS: "{{ network_api_extensions | join(',') }}"