diff --git a/neutron/tests/tempest/api/test_extension_driver_port_security.py b/neutron/tests/tempest/api/test_extension_driver_port_security.py
index 8e3ec07..381252a 100644
--- a/neutron/tests/tempest/api/test_extension_driver_port_security.py
+++ b/neutron/tests/tempest/api/test_extension_driver_port_security.py
@@ -76,7 +76,7 @@
         network = self.create_network()
         self.create_subnet(network)
 
-        sec_group_body, sec_group_name = self._create_security_group()
+        sec_group_body, _ = self._create_security_group()
         port = self.create_port(network)
 
         # Exception when set port-sec to False with sec-group defined
diff --git a/neutron/tests/tempest/scenario/test_trunk.py b/neutron/tests/tempest/scenario/test_trunk.py
index d5ffd45..112c17b 100644
--- a/neutron/tests/tempest/scenario/test_trunk.py
+++ b/neutron/tests/tempest/scenario/test_trunk.py
@@ -29,9 +29,10 @@
 CONF = config.CONF
 
 CONFIGURE_VLAN_INTERFACE_COMMANDS = (
-    'IFACE=$(ip l | grep "^[0-9]*: e" | cut -d \: -f 2) && '
+    'IFACE=$(PATH=$PATH:/usr/sbin ip l | grep "^[0-9]*: e" |'
+    'cut -d \: -f 2) && '
     'sudo su -c '
-    '"ip l a link $IFACE name $IFACE.%(tag)d type vlan id %(tag)d && '
+    '"ip l a link $IFACE name $IFACE.%(tag)d type vlan id %(tag)d &&'
     'ip l s up dev $IFACE.%(tag)d && '
     'dhclient $IFACE.%(tag)d"')
 
@@ -227,7 +228,7 @@
         vlan_network = self.create_network()
         new_subnet_cidr = get_next_subnet(
             config.safe_get_config_value('network', 'project_network_cidr'))
-        self.create_subnet(vlan_network, cidr=new_subnet_cidr)
+        self.create_subnet(vlan_network, gateway=None, cidr=new_subnet_cidr)
 
         servers = [
             self._create_server_with_port_and_subport(vlan_network, vlan_tag)