diff --git a/manifests/mistral.pp b/manifests/mistral.pp
index 4df2a710d..325d030c1 100644
--- a/manifests/mistral.pp
+++ b/manifests/mistral.pp
@@ -62,6 +62,7 @@ class openstack_integration::mistral {
       ssl_key   => "/etc/mistral/ssl/private/${::fqdn}.pem",
       ssl_cert  => $::openstack_integration::params::cert_path,
       workers   => 2,
+      threads   => 1,
     }
     class { '::mistral::client': }
     class { '::mistral::engine': }
diff --git a/run_tests.sh b/run_tests.sh
index f5f14f230..cff389dc6 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -306,7 +306,7 @@ if uses_debs; then
   # 1) fwaas tests from ubuntu are still out of date LP#1667736
   EXCLUDES="--regex=^(?!neutron_fwaas.tests.tempest_plugin.tests.api.test_fwaas_extensions.*$)(?!mistral_tempest_tests.tests.api.v2.test_executions.ExecutionTestsV2.test_get_list_executions.*$)(?!ceilometer.tests.tempest.api.test_telemetry_notification_api.TelemetryNotificationAPITest.test_check_glance_v2_notifications.*$).*"
 else
-  EXCLUDES="--regex=^(?!mistral_tempest_tests.tests.api.v2.test_executions.ExecutionTestsV2.test_get_list_executions.*$)(?!ceilometer.tests.tempest.api.test_telemetry_notification_api.TelemetryNotificationAPITest.test_check_glance_v2_notifications.*$).*"
+  EXCLUDES="--regex=^(?!ceilometer.tests.tempest.api.test_telemetry_notification_api.TelemetryNotificationAPITest.test_check_glance_v2_notifications.*$).*"
 fi
 print_header 'Running Tempest'
 cd /tmp/openstack/tempest