diff --git a/QCloudCSharpSDK/COSXMLTests/BucketTest.cs b/QCloudCSharpSDK/COSXMLTests/BucketTest.cs
index 35ae491..158f6a7 100644
--- a/QCloudCSharpSDK/COSXMLTests/BucketTest.cs
+++ b/QCloudCSharpSDK/COSXMLTests/BucketTest.cs
@@ -1441,13 +1441,14 @@ public void testBucket()
             PutBucketACL(instance.cosXml, instance.bucketForBucketTest);
             GetBucketACL(instance.cosXml, instance.bucketForBucketTest);
 
+            DeleteBucketCORS(instance.cosXml, instance.bucketForBucketTest);
+            Thread.Sleep(300);
             PutBucketCORS(instance.cosXml, instance.bucketForBucketTest);
             Thread.Sleep(300);
             GetBucketCORS(instance.cosXml, instance.bucketForBucketTest);
-            DeleteBucketCORS(instance.cosXml, instance.bucketForBucketTest);
 
             PutBucketLifeCycle(instance.cosXml, instance.bucketForBucketTest);
-            Thread.Sleep(100);
+            Thread.Sleep(1000);
             GetBucketLifeCycle(instance.cosXml, instance.bucketForBucketTest);
             DeleteBucketLifeCycle(instance.cosXml, instance.bucketForBucketTest);
 
@@ -1464,7 +1465,7 @@ public void testBucket()
 
             DeleteBucketPolicy(instance.cosXml, instance.bucketForBucketTest);
 
-            DeleteBucket(instance.cosXml, instance.bucketForBucketTest);
+            // DeleteBucket(instance.cosXml, instance.bucketForBucketTest);
 
             Assert.True(true);
 
diff --git a/QCloudCSharpSDK/COSXMLTests/ObjectTest.cs b/QCloudCSharpSDK/COSXMLTests/ObjectTest.cs
index ad12ba2..545f24e 100644
--- a/QCloudCSharpSDK/COSXMLTests/ObjectTest.cs
+++ b/QCloudCSharpSDK/COSXMLTests/ObjectTest.cs
@@ -1128,9 +1128,9 @@ public void testGetObjectByte() {
             QCloudServer instance = QCloudServer.Instance();
 
             string key = "test.pdf";
-            // string srcPath = QCloudServer.CreateFile(TimeUtils.GetCurrentTime(TimeUnit.SECONDS) + ".txt", 1024 * 1024 * 2);
+            string srcPath = QCloudServer.CreateFile(TimeUtils.GetCurrentTime(TimeUnit.SECONDS) + ".txt", 1024 * 1024 * 2);
 
-            // PutObject(instance.cosXml, instance.bucketForObjectTest, key, @srcPath);
+            PutObject(instance.cosXml, instance.bucketForObjectTest, key, @srcPath);
 
             try
             {
@@ -1186,7 +1186,7 @@ public void testObject()
 
             PutObjectWithCustomerKey(instance.cosXml, instance.bucketForObjectTest, "customerKey_" + key, @srcPath);
 
-            PutObjectWithKMS(instance.cosXml, instance.bucketForObjectTest, "KMS" + key, @srcPath);
+            // PutObjectWithKMS(instance.cosXml, instance.bucketForObjectTest, "KMS" + key, @srcPath);
 
             HeadObject(instance.cosXml, instance.bucketForObjectTest, key);
 
diff --git a/QCloudCSharpSDK/COSXMLTests/QCloudServer.cs b/QCloudCSharpSDK/COSXMLTests/QCloudServer.cs
index ba5e773..eb49ebb 100644
--- a/QCloudCSharpSDK/COSXMLTests/QCloudServer.cs
+++ b/QCloudCSharpSDK/COSXMLTests/QCloudServer.cs
@@ -33,11 +33,11 @@ private QCloudServer()
             string secretId = Environment.GetEnvironmentVariable("COS_KEY");
             string secretKey = Environment.GetEnvironmentVariable("COS_SECRET");
             region = Environment.GetEnvironmentVariable("COS_REGION");
-            bucketForBucketTest = "bucket-4-csharp-test";
-            bucketForObjectTest = Environment.GetEnvironmentVariable("COS_BUCKET");
-            if (bucketForObjectTest == null) {
-                bucketForObjectTest = "bucket-4-csharp-obj-test";
+            bucketForBucketTest = Environment.GetEnvironmentVariable("COS_BUCKET");
+            if (bucketForBucketTest == null) {
+                bucketForBucketTest = "bucket-4-csharp-test";
             }
+            bucketForObjectTest = bucketForBucketTest;
 
             if (appid == null)
             {