diff --git a/test/manipulate.test.js b/test/manipulate.test.js
index 6a85769ff..5af5bf366 100644
--- a/test/manipulate.test.js
+++ b/test/manipulate.test.js
@@ -52,3 +52,13 @@ it('Add Time days', () => {
 it('Subtract Time days', () => {
   expect(dayjs().subtract(1, 'days').valueOf()).toBe(moment().subtract(1, 'days').valueOf())
 })
+
+it('Add Time days (DST)', () => {
+  // change timezone before running test
+  // New Zealand (-720)
+  expect(dayjs('2018-04-01').add(1, 'd').format()).toBe(moment('2018-04-01').add(1, 'd').format())
+  expect(dayjs('2018-03-28').add(1, 'w').format()).toBe(moment('2018-03-28').add(1, 'w').format())
+  // London (-60)
+  expect(dayjs('2018-10-28').add(1, 'd').format()).toBe(moment('2018-10-28').add(1, 'd').format())
+  expect(dayjs('2018-10-26').add(1, 'w').format()).toBe(moment('2018-10-26').add(1, 'w').format())
+})