anchor.diff:  
           machine.screenshot("after_copy_from_chromium")
   
  +
  +    with test_new_win("gpu_info", "chrome://gpu", "chrome://gpu"):
  +        pass
  +
  +
       machine.shutdown()
     '';
   }) channelMap
  
positive.code:   machine.imports = [ ./common/user-account.nix ./common/x11.nix ];
    machine.virtualisation.memorySize = 2047;
    machine.test-support.displayManager.auto.user = user;
    machine.environment.systemPackages = [ chromiumPkg ];
  
    startupHTML = pkgs.writeText "chromium-startup.html" ''
      <!DOCTYPE html>
  
negative.code: 
  
      @contextmanager
      def test_new_win(description, url, window_name):
          create_new_win()
          machine.wait_for_window("New Tab")
          machine.send_chars(f"{url}\n")
          machine.wait_for_window(window_name)
          machine.screenshot(description)
          machine.succeed(
              ru(
                  "${xdo "copy-all" ''
                    key --delay 1000 Ctrl+a Ctrl+c
                  ''}"
              )
          )
          clipboard = machine.succeed(
              ru("${pkgs.xclip}/bin/xclip -o")
          )
          print(f"{description} window content:\n{clipboard}")
          with machine.nested(description):
              yield clipboard
          # Close the newly created window:
          machine.send_key("ctrl-w")
  
  