I suppose the only way to do this is to put a temporary shunt in your story to leap ahead for testing.
There's no 'leap to section' I know of, outside of the obvious coding controls.
You can change your "@start . . ." line at the beginning. Another way might be to have a "Go To" option that is loaded by the master section on every section change. Click on it / see a list of all (or a helpfull selection) of sections to jump to.