https://techcrunch.com/2020/11/24/spacex-targeting-next-week-for-starships-first-high-altitude-test-flight/

SpaceX looks ready to proceed to the next crucial phase of its Starship spacecraft development program: A 15km (50,000 feet) test flight. This would far exceed the max height that any prior Starship prototype has achieved so far, since the current record-setting hop test maxed out at around 500 feet. Elon Musk says that SpaceX will look to make its first high-altitude attempt sometime next week.

This tentative date (these are always subject to change) follows a successful static test fire of the current SN8 generation prototype — essentially just firing the test spacecraft’s Raptor engines while it remains stationary on the pad. That’s a crucial step that paves the way for any actual flight, since it proves that the spacecraft can essentially hold together and withstand the pressures of active engines before it leaves the ground.