diff --git a/test/intl402/NumberFormat/prototype/toStringTag/initial-value.js b/test/intl402/NumberFormat/prototype/toStringTag/configurable.js
similarity index 100%
rename from test/intl402/NumberFormat/prototype/toStringTag/initial-value.js
rename to test/intl402/NumberFormat/prototype/toStringTag/configurable.js
diff --git a/test/intl402/NumberFormat/prototype/toStringTag/prop-desc.js b/test/intl402/NumberFormat/prototype/toStringTag/prop-desc.js
index 25fbb74f5f32f587162f1cd3886b0e11d0b6e346..34367a35cea38be3f3767adcf1e628d29e8e5081 100644
--- a/test/intl402/NumberFormat/prototype/toStringTag/prop-desc.js
+++ b/test/intl402/NumberFormat/prototype/toStringTag/prop-desc.js
@@ -8,6 +8,7 @@ description: >
 includes: [propertyHelper.js]
 ---*/
 
+assert.sameValue(Intl.NumberFormat.prototype[Symbol.toStringTag], 'Object');
 verifyProperty(Intl.NumberFormat.prototype, Symbol.toStringTag, {
   writable: false,
   enumerable: false,