diff --git a/neutron/tests/contrib/tempest_blacklist.txt b/neutron/tests/contrib/tempest_blacklist.txt
new file mode 100644
index 00000000000..e172b866b33
--- /dev/null
+++ b/neutron/tests/contrib/tempest_blacklist.txt
@@ -0,0 +1,8 @@
+# Tests outside of neutron repository regularly failing
+# in Extended Maintenance branches
+# In these branches, "There is no statement about the level of testing and
+# upgrades from Extended Maintenance are not supported within the Community."
+# Blacklist them to limit CI usage for backports
+
+# https://bugs.launchpad.net/neutron/+bug/1821925
+tempest.api.volume.test_volumes_extend.VolumesExtendTest.test_volume_extend_when_volume_has_snapshot
diff --git a/playbooks/legacy/neutron-tempest-dvr-ha-multinode-full/run.yaml b/playbooks/legacy/neutron-tempest-dvr-ha-multinode-full/run.yaml
index eecae671262..76557318b7e 100644
--- a/playbooks/legacy/neutron-tempest-dvr-ha-multinode-full/run.yaml
+++ b/playbooks/legacy/neutron-tempest-dvr-ha-multinode-full/run.yaml
@@ -50,6 +50,7 @@
           export DEVSTACK_GATE_TEMPEST_FULL=1
           # Test DVR works multinode
           export DEVSTACK_GATE_NEUTRON_DVR=1
+          export DEVSTACK_GATE_TEMPEST_REGEX="'(^tempest\.scenario.*)|(?!.*\[.*\bslow\b.*\])(^tempest\.api)' --blacklist-file=/opt/stack/new/neutron/neutron/tests/contrib/tempest_blacklist.txt"
           export BRANCH_OVERRIDE=default
           if [ "$BRANCH_OVERRIDE" != "default" ] ; then
               export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
diff --git a/playbooks/legacy/neutron-tempest-dvr/run.yaml b/playbooks/legacy/neutron-tempest-dvr/run.yaml
index 9cb227547ae..ae4ae31ec18 100644
--- a/playbooks/legacy/neutron-tempest-dvr/run.yaml
+++ b/playbooks/legacy/neutron-tempest-dvr/run.yaml
@@ -33,6 +33,7 @@
           export DEVSTACK_GATE_TEMPEST_FULL=1
           export DEVSTACK_GATE_NEUTRON_DVR=1
           export DEVSTACK_GATE_TLSPROXY=1
+          export DEVSTACK_GATE_TEMPEST_REGEX="'(^tempest\.scenario.*)|(?!.*\[.*\bslow\b.*\])(^tempest\.api)' --blacklist-file=/opt/stack/new/neutron/neutron/tests/contrib/tempest_blacklist.txt"
           export BRANCH_OVERRIDE=default
           if [ "$BRANCH_OVERRIDE" != "default" ] ; then
               export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
diff --git a/playbooks/legacy/neutron-tempest-linuxbridge/run.yaml b/playbooks/legacy/neutron-tempest-linuxbridge/run.yaml
index 2152e2e1f80..b82d71b30eb 100644
--- a/playbooks/legacy/neutron-tempest-linuxbridge/run.yaml
+++ b/playbooks/legacy/neutron-tempest-linuxbridge/run.yaml
@@ -46,6 +46,7 @@
           export DEVSTACK_GATE_TEMPEST_FULL=1
           export DEVSTACK_GATE_NEUTRON=1
           export DEVSTACK_GATE_TLSPROXY=1
+          export DEVSTACK_GATE_TEMPEST_REGEX="'(^tempest\.scenario.*)|(?!.*\[.*\bslow\b.*\])(^tempest\.api)' --blacklist-file=/opt/stack/new/neutron/neutron/tests/contrib/tempest_blacklist.txt"
           export BRANCH_OVERRIDE=default
           if [ "$BRANCH_OVERRIDE" != "default" ] ; then
               export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
diff --git a/playbooks/legacy/neutron-tempest-multinode-full/run.yaml b/playbooks/legacy/neutron-tempest-multinode-full/run.yaml
index a8972f5a5c4..9ce9330fd14 100644
--- a/playbooks/legacy/neutron-tempest-multinode-full/run.yaml
+++ b/playbooks/legacy/neutron-tempest-multinode-full/run.yaml
@@ -51,6 +51,7 @@
           export DEVSTACK_GATE_TLSPROXY=1
           # Default to non DVR
           export DEVSTACK_GATE_NEUTRON_DVR=0
+          export DEVSTACK_GATE_TEMPEST_REGEX="'(^tempest\.scenario.*)|(?!.*\[.*\bslow\b.*\])(^tempest\.api)' --blacklist-file=/opt/stack/new/neutron/neutron/tests/contrib/tempest_blacklist.txt"
           export BRANCH_OVERRIDE=default
           if [ "$BRANCH_OVERRIDE" != "default" ] ; then
               export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
diff --git a/playbooks/legacy/neutron-tempest-ovsfw/run.yaml b/playbooks/legacy/neutron-tempest-ovsfw/run.yaml
index ac2dc19964a..94169149b59 100644
--- a/playbooks/legacy/neutron-tempest-ovsfw/run.yaml
+++ b/playbooks/legacy/neutron-tempest-ovsfw/run.yaml
@@ -31,13 +31,14 @@
           export DEVSTACK_GATE_TEMPEST=1
           export DEVSTACK_GATE_TEMPEST_FULL=1
           export DEVSTACK_GATE_NEUTRON=1
+          export DEVSTACK_GATE_TEMPEST_REGEX="'(^tempest\.scenario.*)|(?!.*\[.*\bslow\b.*\])(^tempest\.api)' --blacklist-file=/opt/stack/new/neutron/neutron/tests/contrib/tempest_blacklist.txt"
           export BRANCH_OVERRIDE=default
           if [ "$BRANCH_OVERRIDE" != "default" ] ; then
               export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
           fi
 
           function gate_hook {
-              bash -xe $BASE/new/neutron/neutron/tests/contrib/gate_hook.sh full-ovsfw
+              bash -xe /opt/stack/new/neutron/neutron/tests/contrib/gate_hook.sh full-ovsfw
           }
           export -f gate_hook