diff --git a/tools/parse_date_test.go b/tools/parse_date_test.go
index cfaadd1..7aa30b2 100644
--- a/tools/parse_date_test.go
+++ b/tools/parse_date_test.go
@@ -16,8 +16,8 @@ func TestParseDate(t *testing.T) {
 	y, mon, d, h, loc := now.Year(), now.Month(), now.Day(), now.Hour(), now.Location()
 	sec := now.Truncate(time.Second)
 	today := time.Date(y, mon, d, 0, 0, 0, 0, loc)
-	tomorrow := today.Add(day)
-	yesterday := today.Add(-day)
+	tomorrow := time.Date(y, mon, d+1, 0, 0, 0, 0, loc)
+	yesterday := time.Date(y, mon, d-1, 0, 0, 0, 0, loc)
 	twoMin := now.Add(2 * time.Minute).Truncate(time.Minute)
 	twoHour := time.Date(y, mon, d, h+2, 0, 0, 0, loc)
 	firstMonth := time.Date(y, mon, 1, 0, 0, 0, 0, loc)