diff --git a/blob/ChangeLog.md b/blob/ChangeLog.md
index 7f7a6cc..3bd9193 100644
--- a/blob/ChangeLog.md
+++ b/blob/ChangeLog.md
@@ -1,5 +1,8 @@
 # Changelog
 
+* Improved comments for `BlockBlobURL.upload()`.
+* Exported `HttpRequestBody` type for who wants to implement a customized HTTP client.
+
 2018.12 10.3.0
 
 * [Breaking] Updated convenience layer methods enum type parameters into typescript union types, this will help reducing bundle footprint.
diff --git a/blob/README.md b/blob/README.md
index 9e01f62..2a88be9 100644
--- a/blob/README.md
+++ b/blob/README.md
@@ -255,7 +255,7 @@ main()
 ## More Code Samples
 
 * [Blob Storage Examples](https://github.com/azure/azure-storage-js/tree/master/blob/samples)
-* [Blob Storage Examples - Test Cases](https://github.com/azure/azure-storage-js/tree/master/blob/test/)
+* [Blob Storage Examples - Test Cases](https://github.com/azure/azure-storage-js/tree/master/blob/tests/)
 
 ## License
 
diff --git a/blob/lib/BlockBlobURL.ts b/blob/lib/BlockBlobURL.ts
index a648260..3d40cd9 100644
--- a/blob/lib/BlockBlobURL.ts
+++ b/blob/lib/BlockBlobURL.ts
@@ -158,8 +158,10 @@ export class BlockBlobURL extends BlobURL {
    *
    * @param {Aborter} aborter Create a new Aborter instance with Aborter.none or Aborter.timeout(),
    *                          goto documents of Aborter for more examples about request cancellation
-   * @param {HttpRequestBody} body
-   * @param {number} contentLength
+   * @param {HttpRequestBody} body Blob, string, ArrayBuffer, ArrayBufferView or a function
+   *                               which returns a new Readable stream whose offset is from data source beginning.
+   * @param {number} contentLength Length of body in bytes. Use Buffer.byteLength() to calculate body length for a
+   *                               string including non non-Base64/Hex-encoded characters.
    * @param {IBlockBlobUploadOptions} [options]
    * @returns {Promise<Models.BlockBlobUploadResponse>}
    * @memberof BlockBlobURL
diff --git a/blob/lib/Pipeline.ts b/blob/lib/Pipeline.ts
index ee400f3..4d5262d 100644
--- a/blob/lib/Pipeline.ts
+++ b/blob/lib/Pipeline.ts
@@ -5,6 +5,7 @@ import {
   HttpOperationResponse,
   HttpPipelineLogger as IHttpPipelineLogger,
   HttpPipelineLogLevel,
+  HttpRequestBody,
   RequestPolicy,
   RequestPolicyFactory,
   RequestPolicyOptions,
@@ -19,6 +20,7 @@ export {
   IHttpPipelineLogger,
   HttpHeaders,
   HttpPipelineLogLevel,
+  HttpRequestBody,
   HttpOperationResponse,
   WebResource,
   BaseRequestPolicy,
diff --git a/blob/tests/bloburl.test.ts b/blob/tests/bloburl.test.ts
index 661a6c8..904fe59 100644
--- a/blob/tests/bloburl.test.ts
+++ b/blob/tests/bloburl.test.ts
@@ -145,7 +145,8 @@ describe("BlobURL", () => {
     assert.equal(result.leaseState, "leased");
     assert.equal(result.leaseStatus, "locked");
 
-    await sleep(16 * 1000);
+    await sleep(20 * 1000);
+
     const result2 = await blobURL.getProperties(Aborter.none);
     assert.ok(!result2.leaseDuration);
     assert.equal(result2.leaseState, "expired");
@@ -187,14 +188,14 @@ describe("BlobURL", () => {
     assert.equal(result.leaseState, "leased");
     assert.equal(result.leaseStatus, "locked");
 
-    await blobURL.breakLease(Aborter.none, 3);
+    await blobURL.breakLease(Aborter.none, 5);
 
     const result2 = await blobURL.getProperties(Aborter.none);
     assert.ok(!result2.leaseDuration);
     assert.equal(result2.leaseState, "breaking");
     assert.equal(result2.leaseStatus, "locked");
 
-    await sleep(3 * 1000);
+    await sleep(5 * 1000);
 
     const result3 = await blobURL.getProperties(Aborter.none);
     assert.ok(!result3.leaseDuration);
diff --git a/blob/tests/node/pagebloburl.test.ts b/blob/tests/node/pagebloburl.test.ts
index 2c8ff88..2627716 100644
--- a/blob/tests/node/pagebloburl.test.ts
+++ b/blob/tests/node/pagebloburl.test.ts
@@ -44,6 +44,9 @@ describe("PageBlobURL", () => {
     );
 
     await containerURL.setAccessPolicy(Aborter.none, "container");
+
+    await sleep(5 * 1000);
+
     let copySource = pageBlobURL.withSnapshot(snapshotResult.snapshot!).url;
     let copyResponse = await destPageBlobURL.startCopyIncremental(
       Aborter.none,