diff --git a/test/model/default/classes/third.yml b/test/model/default/classes/third.yml
index 135acd4..81fd979 100644
--- a/test/model/default/classes/third.yml
+++ b/test/model/default/classes/third.yml
@@ -10,6 +10,12 @@
       fail:
         at:
           tree: ${_param:notfound}
+  1:
+    an_numeric_key: true
+    as_a_dict: 1
+  2:
+  - as_a_list
+  3: value
   three: ${two}
   empty:
     list: []