diff --git a/tempest/api/network/admin/test_negative_quotas.py b/tempest/api/network/admin/test_negative_quotas.py
index 5c4c421..fb5e662 100644
--- a/tempest/api/network/admin/test_negative_quotas.py
+++ b/tempest/api/network/admin/test_negative_quotas.py
@@ -29,6 +29,7 @@
 
         quota_driver = neutron.db.quota_db.DbQuotaDriver
     """
+    force_tenant_isolation = True
 
     @classmethod
     def skip_checks(cls):