diff --git a/test/intl402/NumberFormat/prototype/this-value-not-numberformat.js b/test/intl402/NumberFormat/prototype/this-value-not-numberformat.js
index e9ef77891f..321947cb29 100644
--- a/test/intl402/NumberFormat/prototype/this-value-not-numberformat.js
+++ b/test/intl402/NumberFormat/prototype/this-value-not-numberformat.js
@@ -12,6 +12,7 @@ author: Norbert Lindenberg
 
 var functions = {
     "format getter": Object.getOwnPropertyDescriptor(Intl.NumberFormat.prototype, "format").get,
+    formatToParts: Intl.NumberFormat.prototype.formatToParts,
     resolvedOptions: Intl.NumberFormat.prototype.resolvedOptions
 };
 var invalidTargets = [undefined, null, true, 0, "NumberFormat", [], {}];