diff --git a/neutron_tempest_plugin/api/test_subnetpools.py b/neutron_tempest_plugin/api/test_subnetpools.py
index dc822e3..ec3753a 100644
--- a/neutron_tempest_plugin/api/test_subnetpools.py
+++ b/neutron_tempest_plugin/api/test_subnetpools.py
@@ -52,9 +52,9 @@
 class SubnetPoolsTest(SubnetPoolsTestBase):
 
     min_prefixlen = '28'
-    max_prefixlen = '31'
+    max_prefixlen = '30'
     _ip_version = 4
-    subnet_cidr = u'10.11.12.0/31'
+    subnet_cidr = u'10.11.12.0/29'
     new_prefix = u'10.11.15.0/24'
     larger_prefix = u'10.11.0.0/16'