diff --git a/neutron_tempest_plugin/vpnaas/scenario/test_vpnaas.py b/neutron_tempest_plugin/vpnaas/scenario/test_vpnaas.py
index 41cd72f..f7b6df2 100644
--- a/neutron_tempest_plugin/vpnaas/scenario/test_vpnaas.py
+++ b/neutron_tempest_plugin/vpnaas/scenario/test_vpnaas.py
@@ -100,10 +100,10 @@
             cls.extra_subnet_attributes['ipv6_address_mode'] = 'slaac'
             cls.extra_subnet_attributes['ipv6_ra_mode'] = 'slaac'
 
-        left_v4_cidr = netaddr.IPNetwork('10.20.0.0/24')
+        left_v4_cidr = netaddr.IPNetwork('10.220.0.0/24')
         left_v6_cidr = netaddr.IPNetwork('2001:db8:0:2::/64')
         cls.left_cidr = left_v6_cidr if cls.inner_ipv6 else left_v4_cidr
-        right_v4_cidr = netaddr.IPNetwork('10.10.0.0/24')
+        right_v4_cidr = netaddr.IPNetwork('10.210.0.0/24')
         right_v6_cidr = netaddr.IPNetwork('2001:db8:0:1::/64')
         cls.right_cidr = right_v6_cidr if cls.inner_ipv6 else right_v4_cidr