srv := Server(sconn, serverConfig)
			if err := srv.Handshake(); err != nil {
				panic(fmt.Errorf("handshake: %v", err))
			}
			if _, err := io.CopyBuffer(srv, srv, buf); err != nil {
				panic(fmt.Errorf("copy buffer: %v", err))
			}
		}
	}()

	b.SetBytes(totalBytes)
	clientConfig := testConfig.Clone()

	defer frontendProxy.Close()

	if _, err = frontendProxy.Client().Get(frontendProxy.URL); err == nil {
		t.Fatalf("want non-nil error")
	}
	// The race detector complains about the proxyLog usage in logf in copyBuffer
	// and our usage below with proxyLog.Bytes() so we're explicitly using a
	// channel to ensure that the ReverseProxy's ServeHTTP is done before we
	// continue after Get.
	<-donec

	expected := []string{

		defer xioutil.ODirectPoolLarge.Put(bufp)
	}

	var written int64
	if odirectEnabled {
		written, err = xioutil.CopyAligned(diskHealthWriter(ctx, w), r, *bufp, fileSize, w)
	} else {
		written, err = io.CopyBuffer(diskHealthWriter(ctx, w), r, *bufp)
	}
	if err != nil {
		w.Close()
		return err
	}

	if written < fileSize && fileSize >= 0 {
		w.Close()
		return errLessData