diff --git a/tests/test_stanza_element.py b/tests/test_stanza_element.py
index 8ebc9b23..1172e885 100644
--- a/tests/test_stanza_element.py
+++ b/tests/test_stanza_element.py
@@ -456,6 +456,7 @@ class TestElementBase(SlixTest):
 
         class TestSubStanza(ElementBase):
             name = "sub"
+            plugin_attrib = name
             namespace = "baz"
             interfaces = {'attrib'}