diff --git a/test/built-ins/Date/UTC/nans.js b/test/built-ins/Date/UTC/nans.js
index 343d2b5a39a0dabe1147cdc709aade58110bdbd0..1363843e0862df9b6290652c646c1f403a0e26a7 100644
--- a/test/built-ins/Date/UTC/nans.js
+++ b/test/built-ins/Date/UTC/nans.js
@@ -17,6 +17,7 @@ info: |
   9. Return TimeClip(MakeDate(MakeDay(yr, m, dt), MakeTime(h, min, s, milli))).
 ---*/
 
+assert.sameValue(Date.UTC(NaN), NaN, 'year');
 assert.sameValue(Date.UTC(NaN, 0), NaN, 'year');
 assert.sameValue(Date.UTC(1970, NaN), NaN, 'month');
 assert.sameValue(Date.UTC(1970, 0, NaN), NaN, 'date');