diff --git a/test/form_up.test.js b/test/form_up.test.js
index 7020ec7..16ee4fb 100644
--- a/test/form_up.test.js
+++ b/test/form_up.test.js
@@ -27,13 +27,19 @@ before(function () {
 });
 
 after(function () {
-    return Promise.all([
-        fs.promises.unlink(testFilePath1),
-        fs.promises.unlink(testFilePath2)
-    ])
-        .catch(err => {
-            console.log('Form upload test. Unlink files failed', err);
-        });
+    return Promise.all(
+        [
+            testFilePath1,
+            testFilePath2
+        ].map(p => new Promise(resolve => {
+            fs.unlink(p, err => {
+                if (err) {
+                    console.log(`unlink ${p} failed`, err);
+                }
+                resolve();
+            });
+        }))
+    );
 });
 
 describe('test form up', function () {
diff --git a/test/resume_up.test.js b/test/resume_up.test.js
index 20b88e1..fc87148 100644
--- a/test/resume_up.test.js
+++ b/test/resume_up.test.js
@@ -67,10 +67,18 @@ before(function () {
 });
 
 after(function () {
-    return fs.promises.unlink(testFilePath)
-        .catch(err => {
-            console.log('Resume upload test. Unlink files failed', err);
-        });
+    return Promise.all(
+        [
+            testFilePath
+        ].map(p => new Promise(resolve => {
+            fs.unlink(p, err => {
+                if (err) {
+                    console.log(`unlink ${p} failed`, err);
+                }
+                resolve();
+            });
+        }))
+    );
 });
 
 // file to upload
@@ -250,7 +258,7 @@ describe('test resume up', function () {
                 if (mimeType !== undefined) {
                     putExtra.mimeType = mimeType;
                 }
-                const key = 'storage_putFile_test' + Math.floor(Math.random() * 1000);
+                const key = 'storage_putFile_test' + Math.floor(Math.random() * 100000);
 
                 const promises = doAndWrapResultPromises(callback =>
                     resumeUploader.putFile(
@@ -325,7 +333,7 @@ describe('test resume up', function () {
                     putExtra.mimeType = mimeType;
                 }
 
-                const key = 'storage_putStream_test' + Math.floor(Math.random() * 1000);
+                const key = 'storage_putStream_test' + Math.floor(Math.random() * 100000);
 
                 const streamSize = 9 * 1024 * 1024;
                 const {
@@ -397,12 +405,16 @@ describe('test resume up', function () {
 
         const filepathListToDelete = [];
         after(function () {
-            return Promise.all(filepathListToDelete.map(p =>
-                fs.promises.unlink(p)
-                    .catch(() => {
-                        // pass
-                    })
-            ));
+            return Promise.all(
+                filepathListToDelete.map(p => new Promise(resolve => {
+                    fs.unlink(p, err => {
+                        if (err) {
+                            console.log(`unlink ${p} failed`, err);
+                        }
+                        resolve();
+                    });
+                }))
+            );
         });
 
         testParams.forEach(testParam => {
@@ -425,7 +437,7 @@ describe('test resume up', function () {
             }
 
             it(`test resume up#putStream resume; ${msg}`, function () {
-                const key = 'storage_putStream_resume_test' + Math.floor(Math.random() * 1000);
+                const key = 'storage_putStream_resume_test' + Math.floor(Math.random() * 100000);
 
                 const putExtra = new qiniu.resume_up.PutExtra();
                 putExtra.resumeRecordFile = path.join(os.tmpdir(), key + '.resume.json');
diff --git a/test/rs.test.js b/test/rs.test.js
index db4edb6..9a35ebb 100644
--- a/test/rs.test.js
+++ b/test/rs.test.js
@@ -522,7 +522,8 @@ describe('test start bucket manager', function () {
 
     // 空间生命周期
     describe('test lifeRule', function () {
-        const ruleName = 'test_rule_name' + Math.floor(Math.random() * 1000);
+        const ruleName = 'test_rule_name' + Math.floor(Math.random() * 100000);
+        const randomPrefix = 'test' + Math.floor(Math.random() * 100000);
 
         function testGet (expectItem, otherRespInfo) {
             return bucketManager.getBucketLifecycleRule(bucketName)
@@ -554,7 +555,7 @@ describe('test start bucket manager', function () {
         it('test lifeRule put', function () {
             const options = {
                 name: ruleName,
-                prefix: 'test',
+                prefix: randomPrefix,
                 to_line_after_days: 30,
                 to_archive_ir_after_days: 35,
                 to_archive_after_days: 40,
@@ -570,7 +571,7 @@ describe('test start bucket manager', function () {
                 should.equal(resp.statusCode, 200, JSON.stringify(resp));
                 return testGet(
                     {
-                        prefix: 'test',
+                        prefix: randomPrefix,
                         to_line_after_days: 30,
                         to_archive_ir_after_days: 35,
                         to_archive_after_days: 40,
@@ -590,9 +591,10 @@ describe('test start bucket manager', function () {
         });
 
         it('test lifeRule update', function () {
+            const expectedPrefix = `update_${randomPrefix}`;
             const options = {
                 name: ruleName,
-                prefix: 'update_prefix',
+                prefix: expectedPrefix,
                 to_line_after_days: 30,
                 to_archive_ir_after_days: 40,
                 to_archive_after_days: 50,
@@ -608,7 +610,7 @@ describe('test start bucket manager', function () {
                 should.equal(resp.statusCode, 200, JSON.stringify(resp));
                 return testGet(
                     {
-                        prefix: 'update_prefix',
+                        prefix: expectedPrefix,
                         to_line_after_days: 30,
                         to_archive_ir_after_days: 40,
                         to_archive_after_days: 50,
@@ -734,7 +736,7 @@ describe('test start bucket manager', function () {
     });
 
     describe('test events', function () {
-        const eventName = 'event_test' + Math.floor(Math.random() * 1000);
+        const eventName = 'event_test' + Math.floor(Math.random() * 100000);
 
         before(function () {
             return bucketManager.deleteBucketEvent(
diff --git a/test/rtc.test.js b/test/rtc.test.js
index bf93ce3..f3d633d 100644
--- a/test/rtc.test.js
+++ b/test/rtc.test.js
@@ -51,6 +51,7 @@ describe('test rtc credentials', function () {
     describe('test update app', function () {
         // eslint-disable-next-line no-undef
         it('update app', function (done) {
+            should.ok(appId, 'appId not found. May create failed');
             appData.title = 'testtitle2';
             qiniu.app.updateApp(appId, appData, credentials, function (err, res) {
                 should.not.exist(err);
@@ -65,6 +66,7 @@ describe('test rtc credentials', function () {
     describe('test get app', function () {
         // eslint-disable-next-line no-undef
         it('get app', function (done) {
+            should.ok(appId, 'appId not found. May create failed');
             qiniu.app.getApp(appId, credentials, function (err, res) {
                 should.not.exist(err);
                 assert.strictEqual(res.title, 'testtitle2');
@@ -78,6 +80,7 @@ describe('test rtc credentials', function () {
     describe('test delete app', function () {
         // eslint-disable-next-line no-undef
         it('delete app', function (done) {
+            should.ok(appId, 'appId not found. May create failed');
             qiniu.app.deleteApp(appId, credentials, function (err) {
                 should.not.exist(err);
                 done();