diff --git a/tests/roles/bootstrap-host/templates/user_variables_ironic.yml.j2 b/tests/roles/bootstrap-host/templates/user_variables_ironic.yml.j2
index 79a2e2c13a..d55b1f696b 100644
--- a/tests/roles/bootstrap-host/templates/user_variables_ironic.yml.j2
+++ b/tests/roles/bootstrap-host/templates/user_variables_ironic.yml.j2
@@ -19,6 +19,5 @@ tempest_test_whitelist:
 tempest_test_blacklist:
   - 'ironic_tempest_plugin.tests.api.admin.test_chassis.TestChassis.test_chassis_node_list'
 
-tempest_run_concurrency: 0
 tempest_service_available_ironic: true
 tempest_service_available_neutron: true
diff --git a/tests/roles/bootstrap-host/templates/user_variables_manila.yml.j2 b/tests/roles/bootstrap-host/templates/user_variables_manila.yml.j2
index 3c41a183c3..a769b754e4 100644
--- a/tests/roles/bootstrap-host/templates/user_variables_manila.yml.j2
+++ b/tests/roles/bootstrap-host/templates/user_variables_manila.yml.j2
@@ -38,8 +38,6 @@ tempest_test_whitelist:
 tempest_test_blacklist:
   - manila_tempest_tests.tests.scenario.test_share_basic_ops.TestShareBasicOpsNFS.test_read_write_two_vms
 
-tempest_run_concurrency: 0
-
 tempest_tempest_conf_overrides:
   share:
     run_consistency_group_tests: False
diff --git a/tests/roles/bootstrap-host/templates/user_variables_neutron_ovn.yml.j2 b/tests/roles/bootstrap-host/templates/user_variables_neutron_ovn.yml.j2
index 3c4fd9a32d..c868f6d637 100644
--- a/tests/roles/bootstrap-host/templates/user_variables_neutron_ovn.yml.j2
+++ b/tests/roles/bootstrap-host/templates/user_variables_neutron_ovn.yml.j2
@@ -19,7 +19,6 @@ neutron_plugin_base:
 
 neutron_ml2_drivers_type: "geneve,vlan,flat"
 
-tempest_run_concurrency: 0
 tempest_plugins:
   - name: neutron-tempest-plugin
     repo: https://opendev.org/openstack/neutron-tempest-plugin
diff --git a/tests/roles/bootstrap-host/templates/user_variables_octavia.yml.j2 b/tests/roles/bootstrap-host/templates/user_variables_octavia.yml.j2
index d56495e6a3..41595df60b 100644
--- a/tests/roles/bootstrap-host/templates/user_variables_octavia.yml.j2
+++ b/tests/roles/bootstrap-host/templates/user_variables_octavia.yml.j2
@@ -23,7 +23,6 @@ octavia_ssh_enabled: True
 octavia_legacy_policy: True
 octavia_amp_vcpu: 2
 octavia_amp_ram: 512
-tempest_run_concurrency: 0
 tempest_service_available_octavia: true
 tempest_tempest_conf_overrides:
   load_balancer: