// Assert the response code with the expected status.
	if rec.Code != http.StatusOK {
		t.Fatalf("%s:  Expected the response status to be `%d`, but instead found `%d`", instanceType, http.StatusOK, rec.Code)
	}

	// decode the response body.
	decoder := xml.NewDecoder(rec.Body)
	multipartResponse := &InitiateMultipartUploadResponse{}

	err = decoder.Decode(multipartResponse)
	if err != nil {