diff --git a/README.md b/README.md
index 0ac7e688..176c96f4 100644
--- a/README.md
+++ b/README.md
@@ -4,9 +4,14 @@ You can send text messages, Kakaotalk in Korea using this package.
 ## Installing
 To use the SDK, simply use npm package manager CLI. Type the following into a terminal window.
 
+### npm
 ```bash
 npm install solapi
 ```
+### yarn
+```bash
+yarn add solapi
+```
 
 ## Usage
 
diff --git a/tests/test.js b/tests/test.js
index caff8692..0a71d0ce 100644
--- a/tests/test.js
+++ b/tests/test.js
@@ -108,7 +108,7 @@ describe('test', () => {
       })
       expect(data.errorCount).to.equal(0)
       const result = await group.sendMessages()
-      expect(result).to.have.all.keys('app', 'balance', 'countForCharge', 'customFields', 'dateCompleted', 'dateSent', 'isRefunded', 'osPlatform', 'point', 'prepaid', 'price', 'sdkVersion', 'serviceMethod', 'strict', 'count', 'log', 'status', '_id', 'groupId', 'hint', 'accountId', 'apiVersion', 'dateCreated', 'dateUpdated', 'flagUpdated')
+      expect(result).to.have.all.keys('app', 'balance', 'countForCharge', 'customFields', 'dateCompleted', 'dateSent', 'isRefunded', 'osPlatform', 'point', 'prepaid', 'price', 'sdkVersion', 'serviceMethod', 'strict', 'count', 'log', 'status', '_id', 'groupId', 'hint', 'masterAccountId', 'accountId', 'apiVersion', 'dateCreated', 'dateUpdated', 'flagUpdated')
     })
     it('그룹 삭제 (정상)', async () => {
       const group = new Group()
@@ -129,7 +129,7 @@ describe('test', () => {
       const group = new Group()
       await group.createGroup()
       const data = await Group.getInfo(group.getGroupId())
-      expect(data).to.have.all.keys('app', 'balance', 'countForCharge', 'customFields', 'dateCompleted', 'dateSent', 'isRefunded', 'osPlatform', 'point', 'prepaid', 'price', 'sdkVersion', 'serviceMethod', 'count', 'log', 'status', 'strict', '_id', 'groupId', 'hint', 'accountId', 'apiVersion', 'dateCreated', 'dateUpdated', 'flagUpdated')
+      expect(data).to.have.all.keys('app', 'balance', 'countForCharge', 'customFields', 'dateCompleted', 'dateSent', 'isRefunded', 'osPlatform', 'point', 'prepaid', 'price', 'sdkVersion', 'serviceMethod', 'count', 'log', 'status', 'strict', '_id', 'groupId', 'hint', 'masterAccountId', 'accountId', 'apiVersion', 'dateCreated', 'dateUpdated', 'flagUpdated')
     })
     it('그룹 정보 조회 (생성 전)', async () => {
       const group = new Group()