diff --git a/neutron/services/metering/drivers/iptables/iptables_driver.py b/neutron/services/metering/drivers/iptables/iptables_driver.py
index dd0ff16a34..fd61ace2ac 100644
--- a/neutron/services/metering/drivers/iptables/iptables_driver.py
+++ b/neutron/services/metering/drivers/iptables/iptables_driver.py
@@ -77,7 +77,7 @@ class RouterWithMetering(object):
         self.router = router
         self.root_helper = config.get_root_helper(self.conf)
         self.iptables_manager = iptables_manager.IptablesManager(
-            root_helper=self.conf.root_helper,
+            root_helper=self.root_helper,
             namespace=self.ns_name(),
             binary_name=WRAP_NAME)
         self.metering_labels = {}
diff --git a/neutron/tests/unit/services/metering/drivers/test_iptables_driver.py b/neutron/tests/unit/services/metering/drivers/test_iptables_driver.py
index 63654361f0..6064407e65 100644
--- a/neutron/tests/unit/services/metering/drivers/test_iptables_driver.py
+++ b/neutron/tests/unit/services/metering/drivers/test_iptables_driver.py
@@ -36,7 +36,7 @@ class IptablesDriverTestCase(base.BaseTestCase):
         self.addCleanup(self.utils_exec_p.stop)
         self.iptables_cls_p = mock.patch(
             'neutron.agent.linux.iptables_manager.IptablesManager')
-        iptables_cls = self.iptables_cls_p.start()
+        self.iptables_cls = self.iptables_cls_p.start()
         self.addCleanup(self.iptables_cls_p.stop)
         self.iptables_inst = mock.Mock()
         self.v4filter_inst = mock.Mock()
@@ -45,15 +45,31 @@ class IptablesDriverTestCase(base.BaseTestCase):
         self.v6filter_inst.chains = []
         self.iptables_inst.ipv4 = {'filter': self.v4filter_inst}
         self.iptables_inst.ipv6 = {'filter': self.v6filter_inst}
-        iptables_cls.return_value = self.iptables_inst
+        self.iptables_cls.return_value = self.iptables_inst
         cfg.CONF.set_override('interface_driver',
                               'neutron.agent.linux.interface.NullDriver')
-        self.router_info_inst = mock.Mock()
-        self.router_info_inst.iptables_manager = self.iptables_inst
-
+        cfg.CONF.set_override('root_helper',
+                              'fake_sudo',
+                              'AGENT')
         self.metering = iptables_driver.IptablesMeteringDriver('metering',
                                                                cfg.CONF)
 
+    def test_root_helper(self):
+        routers = [{'_metering_labels': [
+            {'id': 'c5df2fe5-c600-4a2a-b2f4-c0fb6df73c83',
+             'rules': []}],
+            'admin_state_up': True,
+            'gw_port_id': '7d411f48-ecc7-45e0-9ece-3b5bdb54fcee',
+            'id': '473ec392-1711-44e3-b008-3251ccfc5099',
+            'name': 'router1',
+            'status': 'ACTIVE',
+            'tenant_id': '6c5f5d2a1fa2441e88e35422926f48e8'}]
+        self.metering.add_metering_label(None, routers)
+
+        self.iptables_cls.assert_called_with(root_helper='fake_sudo',
+                                             namespace=mock.ANY,
+                                             binary_name=mock.ANY)
+
     def test_add_metering_label(self):
         routers = [{'_metering_labels': [
             {'id': 'c5df2fe5-c600-4a2a-b2f4-c0fb6df73c83',