c.Assert(err, nil)
	request.Header.Set("If-Unmodified-Since", t.Add(-10*time.Minute).UTC().Format(http.TimeFormat))
	response, err = s.client.Do(request)
	c.Assert(err, nil)
	c.Assert(response.StatusCode, http.StatusPreconditionFailed)

	// make HTTP request to obtain object info.
	// But this time set a date with unrecognized format to the "If-Modified-Since" header

			if err = xml.Unmarshal(rec.Body.Bytes(), &cpObjResp); err != nil {
				t.Fatalf("Test %d: %s: Failed to parse the CopyObjectResult response: <ERROR> %s", i, instanceType, err)
			}

			// See if the new object is formed.
			// testing whether the copy was successful.
			// Note that this goes directly to the file system,
			// so encryption/compression may interfere at some point.
			buffers[0].Reset()