diff --git a/tests/schemas/array-set.json b/tests/schemas/array-set.json
index ff89dcd..0a4feb7 100644
--- a/tests/schemas/array-set.json
+++ b/tests/schemas/array-set.json
@@ -7,6 +7,7 @@
       "type": "string"
     },
     "uniqueItems": true,
+    "set": true,
     "type": "array"
   },
   "valid": [