diff --git a/package.json b/package.json
index 4ae0104d4..0b6d70217 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "types": "index.d.ts",
   "module": "./src/index.js",
   "scripts": {
-    "test": "jest && TZ=Pacific/Auckland npm run test-tz && TZ=Europe/London npm run test-tz && npm run test-tz",
+    "test": "TZ=Pacific/Auckland npm run test-tz && TZ=Europe/London npm run test-tz && npm run test-tz && jest",
     "test-tz": "jest test/timezone.test --coverage=false",
     "lint": "./node_modules/.bin/eslint src/* test/* build/*",
     "build": "cross-env BABEL_ENV=build node build && npm run size",
diff --git a/src/locale/es-do.js b/src/locale/es-do.js
index 434584ecd..4b4ccb42b 100644
--- a/src/locale/es-do.js
+++ b/src/locale/es-do.js
@@ -7,6 +7,7 @@ const locale = {
   weekdaysMin: 'do_lu_ma_mi_ju_vi_sá'.split('_'),
   months: 'Enero_Febrero_Marzo_Abril_Mayo_Junio_Julio_Agosto_Septiembre_Octubre_Noviembre_Diciembre'.split('_'),
   monthsShort: 'ene_feb_mar_abr_may_jun_jul_ago_sep_oct_nov_dic'.split('_'),
+  weekStart: 1,
   relativeTime: {
     future: 'en %s',
     past: 'hace %s',
diff --git a/src/locale/es.js b/src/locale/es.js
index e39e4b175..fb76b51c0 100644
--- a/src/locale/es.js
+++ b/src/locale/es.js
@@ -7,6 +7,7 @@ const locale = {
   weekdaysShort: 'dom._lun._mar._mié._jue._vie._sáb.'.split('_'),
   weekdaysMin: 'do_lu_ma_mi_ju_vi_sá'.split('_'),
   months: 'Enero_Febrero_Marzo_Abril_Mayo_Junio_Julio_Agosto_Septiembre_Octubre_Noviembre_Diciembre'.split('_'),
+  weekStart: 1,
   formats: {
     LT: 'H:mm',
     LTS: 'H:mm:ss',
diff --git a/test/locale/keys.test.js b/test/locale/keys.test.js
index 85746e524..1e65d1e24 100644
--- a/test/locale/keys.test.js
+++ b/test/locale/keys.test.js
@@ -23,7 +23,8 @@ it('Locale keys', () => {
       relativeTime,
       weekdaysShort,
       monthsShort,
-      weekdaysMin
+      weekdaysMin,
+      weekStart
     } = l
     expect(name).toEqual(expect.any(String))
     expect(weekdays).toEqual(expect.any(Array))
@@ -31,6 +32,7 @@ it('Locale keys', () => {
     if (weekdaysShort) expect(weekdaysShort).toEqual(expect.any(Array))
     if (monthsShort) expect(monthsShort).toEqual(expect.any(Array))
     if (weekdaysMin) expect(weekdaysMin).toEqual(expect.any(Array))
+    if (weekStart) expect(weekStart).toEqual(expect.any(Number))
 
     expect(months).toEqual(expect.any(Array))
     // function pass date return string or number or null
diff --git a/test/manipulate.test.js b/test/manipulate.test.js
index fd5cb72d1..ae0c8fec9 100644
--- a/test/manipulate.test.js
+++ b/test/manipulate.test.js
@@ -2,6 +2,7 @@ import moment from 'moment'
 import MockDate from 'mockdate'
 import dayjs from '../src'
 import '../src/locale/zh-cn'
+import '../src/locale/ar'
 
 beforeEach(() => {
   MockDate.set(new Date())
@@ -31,7 +32,11 @@ describe('StartOf EndOf', () => {
   })
 
   it('StartOf week with locale', () => {
-    expect(dayjs().locale('zh-cn').startOf('week').format()).toBe(moment().locale('zh-cn').startOf('week').format())
+    const testArr = ['zh-cn']
+    testArr.forEach((l) => {
+      expect(dayjs().locale(l).startOf('week').date()).toBe(moment().locale(l).startOf('week').date())
+      expect(dayjs().locale(l).endOf('week').date()).toBe(moment().locale(l).endOf('week').date())
+    })
   })
 })