diff --git a/util/dbutil/common.go b/util/dbutil/common.go
index 108e10f01b5f1..4ceb0c08d36da 100644
--- a/util/dbutil/common.go
+++ b/util/dbutil/common.go
@@ -320,9 +320,7 @@ func GetTimeZoneOffset(ctx context.Context, db QueryExecutor) (time.Duration, er
 
 	hour, minute, second := t.Clock()
 	// nolint:durationcheck
-	return (time.Duration(hour)*time.Hour +
-		time.Duration(minute)*time.Minute +
-		time.Duration(second)*time.Second) * factor * time.Second, nil
+	return time.Duration(hour*3600+minute*60+second) * time.Second * factor, nil
 }
 
 // FormatTimeZoneOffset is to format offset of timezone.
diff --git a/util/dbutil/common_test.go b/util/dbutil/common_test.go
index 543cebc190e38..d7acd6174b17c 100644
--- a/util/dbutil/common_test.go
+++ b/util/dbutil/common_test.go
@@ -245,3 +245,14 @@ func TestFormatTimeZoneOffset(t *testing.T) {
 		require.Equal(t, offset, k)
 	}
 }
+
+func TestGetTimeZoneOffset(t *testing.T) {
+	db, mock, err := sqlmock.New()
+	require.NoError(t, err)
+
+	mock.ExpectQuery("SELECT cast\\(TIMEDIFF\\(NOW\\(6\\), UTC_TIMESTAMP\\(6\\)\\) as time\\);").
+		WillReturnRows(mock.NewRows([]string{""}).AddRow("01:00:00"))
+	d, err := GetTimeZoneOffset(context.Background(), db)
+	require.NoError(t, err)
+	require.Equal(t, "1h0m0s", d.String())
+}