diff --git a/designate_tempest_plugin/tests/api/v2/test_tld.py b/designate_tempest_plugin/tests/api/v2/test_tld.py
index 16711e4..e2894fe 100644
--- a/designate_tempest_plugin/tests/api/v2/test_tld.py
+++ b/designate_tempest_plugin/tests/api/v2/test_tld.py
@@ -33,7 +33,8 @@
                    "primary", "alt", "project_reader", "project_member"]
 
     # Use a TLD suffix unique to this test class.
-    local_tld_suffix = '.'.join(["tldadmintest", CONF.dns.tld_suffix])
+    local_tld_suffix = '.'.join(["tldadmintest", 'in-addr.arpa',
+                                 CONF.dns.tld_suffix])
 
     @classmethod
     def setup_credentials(cls):