diff --git a/zuul.d/master_jobs.yaml b/zuul.d/master_jobs.yaml
index 56f7a6c..9f9b99c 100644
--- a/zuul.d/master_jobs.yaml
+++ b/zuul.d/master_jobs.yaml
@@ -300,7 +300,6 @@
       - ^neutron/services/trunk/drivers/ovn/.*$
       - ^neutron/cmd/ovn/.*$
       - ^neutron/common/ovn/.*$
-      - ^neutron_tempest_plugin/api/test_.*$
       - ^neutron_tempest_plugin/(bgpvpn|fwaas|neutron_dynamic_routing|sfc|tap_as_a_service|vpnaas).*$
       - ^neutron_tempest_plugin/services/bgp/.*$
       - ^rally-jobs/.*$
@@ -401,7 +400,6 @@
       - ^neutron/services/trunk/drivers/ovn/.*$
       - ^neutron/cmd/ovn/.*$
       - ^neutron/common/ovn/.*$
-      - ^neutron_tempest_plugin/api/test_.*$
       - ^neutron_tempest_plugin/(bgpvpn|fwaas|neutron_dynamic_routing|sfc|tap_as_a_service|vpnaas).*$
       - ^neutron_tempest_plugin/services/bgp/.*$
       - ^rally-jobs/.*$
@@ -550,7 +548,6 @@
       - ^neutron/services/trunk/drivers/ovn/.*$
       - ^neutron/cmd/ovn/.*$
       - ^neutron/common/ovn/.*$
-      - ^neutron_tempest_plugin/api/test_.*$
       - ^neutron_tempest_plugin/(bgpvpn|fwaas|neutron_dynamic_routing|sfc|tap_as_a_service|vpnaas).*$
       - ^neutron_tempest_plugin/services/bgp/.*$
       - ^rally-jobs/.*$
@@ -687,7 +684,6 @@
       - ^neutron/services/trunk/drivers/linuxbridge/.*$
       - ^neutron/services/trunk/drivers/openvswitch/.*$
       - ^neutron/scheduler/.*$
-      - ^neutron_tempest_plugin/api/test_.*$
       - ^neutron_tempest_plugin/(bgpvpn|fwaas|neutron_dynamic_routing|sfc|tap_as_a_service|vpnaas).*$
       - ^neutron_tempest_plugin/services/bgp/.*$
       - ^rally-jobs/.*$
@@ -1033,6 +1029,7 @@
         q-l3: true
         q-meta: true
         q-metering: true
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.bgpvpn
       network_api_extensions_bgpvpn:
         - bgpvpn
@@ -1205,6 +1202,7 @@
       - openstack/neutron-tempest-plugin
       - openstack/tempest
     vars:
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.vpnaas
       devstack_plugins:
         neutron-vpnaas: https://opendev.org/openstack/neutron-vpnaas.git
@@ -1270,6 +1268,7 @@
       - openstack/tap-as-a-service
       - openstack/tempest
     vars:
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.tap_as_a_service
       tox_envlist: all
       network_api_extensions_tempest:
diff --git a/zuul.d/queens_jobs.yaml b/zuul.d/queens_jobs.yaml
index 35fba1b..3a1c37f 100644
--- a/zuul.d/queens_jobs.yaml
+++ b/zuul.d/queens_jobs.yaml
@@ -25,6 +25,7 @@
         q-meta: true
         q-metering: true
       branch_override: stable/queens
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.api
       # TODO(slaweq): find a way to put this list of extensions in
       # neutron repository and keep it different per branch,
diff --git a/zuul.d/rocky_jobs.yaml b/zuul.d/rocky_jobs.yaml
index 62e57bf..75d7098 100644
--- a/zuul.d/rocky_jobs.yaml
+++ b/zuul.d/rocky_jobs.yaml
@@ -27,6 +27,7 @@
         q-meta: true
         q-metering: true
       branch_override: stable/rocky
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.api
       # TODO(slaweq): find a way to put this list of extensions in
       # neutron repository and keep it different per branch,
diff --git a/zuul.d/stein_jobs.yaml b/zuul.d/stein_jobs.yaml
index d494559..0f18a8a 100644
--- a/zuul.d/stein_jobs.yaml
+++ b/zuul.d/stein_jobs.yaml
@@ -25,6 +25,7 @@
         q-meta: true
         q-metering: true
       branch_override: stable/stein
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.api
       # TODO(slaweq): find a way to put this list of extensions in
       # neutron repository and keep it different per branch,
diff --git a/zuul.d/train_jobs.yaml b/zuul.d/train_jobs.yaml
index 961b3b7..c8c2efe 100644
--- a/zuul.d/train_jobs.yaml
+++ b/zuul.d/train_jobs.yaml
@@ -25,6 +25,7 @@
         q-meta: true
         q-metering: true
       branch_override: stable/train
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.api
       # TODO(slaweq): find a way to put this list of extensions in
       # neutron repository and keep it different per branch,
diff --git a/zuul.d/ussuri_jobs.yaml b/zuul.d/ussuri_jobs.yaml
index 28fccc6..56da160 100644
--- a/zuul.d/ussuri_jobs.yaml
+++ b/zuul.d/ussuri_jobs.yaml
@@ -25,6 +25,7 @@
         q-meta: true
         q-metering: true
       branch_override: stable/ussuri
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.api
       # TODO(slaweq): find a way to put this list of extensions in
       # neutron repository and keep it different per branch,
diff --git a/zuul.d/victoria_jobs.yaml b/zuul.d/victoria_jobs.yaml
index 67737a7..7a92403 100644
--- a/zuul.d/victoria_jobs.yaml
+++ b/zuul.d/victoria_jobs.yaml
@@ -24,6 +24,7 @@
         q-meta: true
         q-metering: true
       branch_override: stable/victoria
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.api
       # TODO(slaweq): find a way to put this list of extensions in
       # neutron repository and keep it different per branch,
diff --git a/zuul.d/wallaby_jobs.yaml b/zuul.d/wallaby_jobs.yaml
index 746ee9c..a3c07c0 100644
--- a/zuul.d/wallaby_jobs.yaml
+++ b/zuul.d/wallaby_jobs.yaml
@@ -3,6 +3,7 @@
     parent: neutron-tempest-plugin-base
     override-checkout: stable/wallaby
     vars:
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.api
       # TODO(slaweq): find a way to put this list of extensions in
       # neutron repository and keep it different per branch,
diff --git a/zuul.d/xena_jobs.yaml b/zuul.d/xena_jobs.yaml
index 1e6eb80..e0a58a7 100644
--- a/zuul.d/xena_jobs.yaml
+++ b/zuul.d/xena_jobs.yaml
@@ -3,6 +3,7 @@
     parent: neutron-tempest-plugin-base
     override-checkout: stable/xena
     vars:
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.api
       # TODO(slaweq): find a way to put this list of extensions in
       # neutron repository and keep it different per branch,
diff --git a/zuul.d/yoga_jobs.yaml b/zuul.d/yoga_jobs.yaml
index 87db14e..bc88c83 100644
--- a/zuul.d/yoga_jobs.yaml
+++ b/zuul.d/yoga_jobs.yaml
@@ -3,6 +3,7 @@
     parent: neutron-tempest-plugin-base
     override-checkout: stable/yoga
     vars:
+      tempest_concurrency: 4
       tempest_test_regex: ^neutron_tempest_plugin\.api
       # TODO(slaweq): find a way to put this list of extensions in
       # neutron repository and keep it different per branch,