diff --git a/test/intl402/DateTimeFormat/prototype/format/fractionalSecondDigits.js b/test/intl402/DateTimeFormat/prototype/format/fractionalSecondDigits.js
index ee2bfc4bf8..5a75b2d173 100644
--- a/test/intl402/DateTimeFormat/prototype/format/fractionalSecondDigits.js
+++ b/test/intl402/DateTimeFormat/prototype/format/fractionalSecondDigits.js
@@ -12,7 +12,7 @@ const d1 = new Date(2019, 7, 10,  1, 2, 3, 234);
 const d2 = new Date(2019, 7, 10,  1, 2, 3, 567);
 
 let dtf = new Intl.DateTimeFormat(
-    'en', { minute: "numeric", second: "numeric", fractionalSecondDigits: 0});
+    'en', { minute: "numeric", second: "numeric", fractionalSecondDigits: undefined});
 assert.sameValue(dtf.format(d1), "02:03", "no fractionalSecondDigits");
 assert.sameValue(dtf.format(d2), "02:03", "no fractionalSecondDigits");