SpaceX ignited engines on both the first and second stages of its Starship launch system on Wednesday, signaling that it is getting closer to a test flight of the massive rocket later this year.

On Monday evening at 5:20 pm local time in South Texas, engineers ignited a single Raptor engine on the Super Heavy booster that serves as the rocket’s first stage. This is the first time the company has conducted a static fire test of the booster, which will ultimately be powered by 33 Raptor rocket engines.

About three hours later, on a separate mount at its “Starbase” facility in Texas, SpaceX ignited two engines on the Starship upper stage of the rocket. The company later shared a short video on Twitter of the evidently successful test.