Resolution criteria for what counts as an attempt adapted from 

For the purposes of this market the test doesn't have to be successful or even conclusive - a scrub is fine as long as it's clear that SpaceX was trying to do an orbital flight test.

I'll resolve YES if an official SpaceX social media channel puts up a livestream entitled "Starship Flight Test" or similar, which shows a live feed of a Starship–Super Heavy full stack vehicle and a countdown, for a flight trajectory that is intended to be orbital or near-orbital, NO if there is clearly no such livestream by market close, and N/A if it is ambiguous whether this has happened at market close.

The relevant timezone is the local time at the launch site.