diff --git a/test/intl402/NumberFormat/constructor-options-toobject.js b/test/intl402/NumberFormat/constructor-options-toobject.js
index a305512b54776201bd4db38c20806eb4255e3848..7b1ed4e4be2f1be9617880533d1256284b9362ec 100644
--- a/test/intl402/NumberFormat/constructor-options-toobject.js
+++ b/test/intl402/NumberFormat/constructor-options-toobject.js
@@ -15,7 +15,9 @@ info: |
 const toObjectResults = [
   [true, new Boolean(true)],
   [42, new Number(42)],
-  ['foo', new String('foo')]
+  ['foo', new String('foo')],
+  [{}, {}],
+  [Symbol(), Object(Symbol())]
 ];
 
 // Test if ToObject is used to convert primitives to Objects.