diff --git a/test/ut/spec/util/time.test.ts b/test/ut/spec/util/time.test.ts
index 60d5467fc7..e19d3dd87d 100755
--- a/test/ut/spec/util/time.test.ts
+++ b/test/ut/spec/util/time.test.ts
@@ -157,34 +157,22 @@ describe('util/time', function () {
         });
 
         it('roundTime_locale', function () {
-            const timezoneStr = getISOTimezone();
-            const time1 = new Date(`1986-10-06T11:25:45.678${timezoneStr}`);
+            const time1 = new Date(1986, 9, 6, 11, 25, 45, 678);
 
             expect(roundTime(new Date(time1), 'year', false).getTime())
-                .toEqual(new Date(`1986-01-01T00:00:00.000${timezoneStr}`).getTime());
+                .toEqual(new Date(1986, 0, 1).getTime());
             expect(roundTime(new Date(time1), 'month', false).getTime())
-                .toEqual(new Date(`1986-10-01T00:00:00.000${timezoneStr}`).getTime());
+                .toEqual(new Date(1986, 9, 1).getTime());
             expect(roundTime(new Date(time1), 'day', false).getTime())
-                .toEqual(new Date(`1986-10-06T00:00:00.000${timezoneStr}`).getTime());
+                .toEqual(new Date(1986, 9, 6).getTime());
             expect(roundTime(new Date(time1), 'hour', false).getTime())
-                .toEqual(new Date(`1986-10-06T11:00:00.000${timezoneStr}`).getTime());
+                .toEqual(new Date(1986, 9, 6, 11).getTime());
             expect(roundTime(new Date(time1), 'minute', false).getTime())
-                .toEqual(new Date(`1986-10-06T11:25:00.000${timezoneStr}`).getTime());
+                .toEqual(new Date(1986, 9, 6, 11, 25).getTime());
             expect(roundTime(new Date(time1), 'second', false).getTime())
-                .toEqual(new Date(`1986-10-06T11:25:45.000${timezoneStr}`).getTime());
+                .toEqual(new Date(1986, 9, 6, 11, 25, 45).getTime());
             expect(roundTime(new Date(time1), 'millisecond', false).getTime())
-                .toEqual(new Date(`1986-10-06T11:25:45.678${timezoneStr}`).getTime());
+                .toEqual(new Date(1986, 9, 6, 11, 25, 45, 678).getTime());
         });
     });
 });
-
-// return timezone format like `'-06:00'` or `'+05:45'`
-function getISOTimezone(): string {
-    const offsetMinutes = (new Date(0)).getTimezoneOffset();
-    // Invert sign because getTimezoneOffset() returns minutes behind UTC
-    const sign = offsetMinutes > 0 ? '-' : '+';
-    const absMinutes = Math.abs(offsetMinutes);
-    const hours = Math.floor(absMinutes / 60);
-    const minutes = absMinutes % 60;
-    return `${sign}${String(hours).padStart(2, '0')}:${String(minutes).padStart(2, '0')}`;
-}