diff --git a/barbican_tempest_plugin/tests/scenario/test_certificate_validation.py b/barbican_tempest_plugin/tests/scenario/test_certificate_validation.py
index 709f29a..f006535 100644
--- a/barbican_tempest_plugin/tests/scenario/test_certificate_validation.py
+++ b/barbican_tempest_plugin/tests/scenario/test_certificate_validation.py
@@ -32,7 +32,7 @@
 
     @classmethod
     def setup_credentials(cls):
-        cls.set_network_resources(network=True)
+        cls.set_network_resources(network=True, subnet=True)
         super().setup_credentials()
 
     @classmethod