apiRouter.ServeHTTP(rec, req)
		// Assert the response code with the expected status.
		if rec.Code != testCase.expectedRespStatus {
			if testCase.copySourceSame {
				// encryption will rotate creds, so fail only for non-encryption scenario.
				if GlobalKMS == nil {
					t.Errorf("Test %d: %s:  Expected the response status to be `%d`, but instead found `%d`", i, instanceType, testCase.expectedRespStatus, rec.Code)

	cred := getReqAccessCred(r, globalSite.Region())
	// In a federated deployment, all the instances share config files
	// and hence expected to have same credentials.
	core, err := miniogo.NewCore(host, &miniogo.Options{
		Creds:     credentials.NewStaticV4(cred.AccessKey, cred.SecretKey, ""),
		Secure:    globalIsTLS,
		Transport: getRemoteInstanceTransport(),
	})
	if err != nil {
		return nil, err
	}