SpaceX announced on Monday it completed a major test of its latest Starship prototype, as the company prepares for the first orbital launch of the towering rocket.

Starship prototype 24, stacked on Super Heavy booster prototype 7, was fueled up at SpaceX’s Starbase facility in Texas in a test known as a “wet dress rehearsal.” While the test does not include firing up the rocket’s engines, it is a typical practice during development of a new liquid-fueled vehicle to show that it can be safely filled before a launch, as well as verify the steps of a launch countdown.

“This was the first time an integrated Ship and Booster were fully loaded with more than 10 million pounds of propellant,” SpaceX said in a tweet.