invalidPartNumber:  true,
			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,
			expectedRespStatus: http.StatusOK,
		},
		// Test case - 13.
		// maximum part number.
		{
			bucketName:         bucketName,
			uploadID:           uploadID,

	c.Assert(err, nil)
	// setting the "X-Amz-Copy-Source" to allow copying the content of previously uploaded object.
	request.Header.Set("X-Amz-Copy-Source", url.QueryEscape(SlashSeparator+bucketName+SlashSeparator+objectName))
	if s.signer == signerV4 {
		err = signRequestV4(request, s.accessKey, s.secretKey)
	} else {
		err = signRequestV2(request, s.accessKey, s.secretKey)
	}