The airport is IFR now so it may be a taxi test only today.
Update 2:15 pm. ZA236 has yet to copy clearance. They have to be back by sunset (4:45 pm) and a 2 hour and 15 minute B1 flight is starting to look unlikely. Several inches of snow is expected tonight and more on Tuesday which may overwhelm the airport maintenance crews, but they do have a new deicer truck and a monster snowplow to work with.
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ANA 787 JA804A was cleared for takeoff to Tokyo at 0354z, a Boeing crew flying the airplane.