diff --git a/tempest/api/network/base.py b/tempest/api/network/base.py
index 8068284..03e73df 100644
--- a/tempest/api/network/base.py
+++ b/tempest/api/network/base.py
@@ -73,6 +73,7 @@
         cidr = netaddr.IPNetwork(cls.network_cfg.tenant_network_cidr)
         mask_bits = cls.network_cfg.tenant_network_mask_bits
         # Find a cidr that is not in use yet and create a subnet with it
+        body = None
         failure = None
         for subnet_cidr in cidr.subnet(mask_bits):
             try: