Link rafiator flow and return for testing?

I'm in the process of remodelling our master bedroom. I have the rad removed and I'm about to put down the flooring. I want to check that the pipes aren't going to move/knock when the CH is warming up prior to fixing the flooring down. Am I ok just to link the flow and turn where the radiator is removed in order to do this test? Or is that a daft idea? If it is a sensible idea, I can't find any connectors to come off the TRV and lockshield so I can temporarily link them with plastic or copper.