That test might result in a price jump despite whether anyone supports the lightning network or fights it. A jump might go above $700 once and for all. There's been a few weeks of calm but some news like that might start the high volume violent price moves again.
Since when did your average trader react to news other than the bad? I can't really think of anything. The unfortunate thing about bad news is that it's usually instant whereas good news always adds to a future just beyond reach.
Was news of the Brexit bad news? It depends on your point of view, but Bitcoin soared back up to $700 as soon as the news was out. I'm certain the fiat market traders who lost a fortune betting on no Brexit viewed it as bad news, and I'm also certain many Bitcoin holders viewed it as good news.