With a short timeline, should I perform usability testing on both iOS and Android?

The situation is this. My company is designing a native app for Android and iOS simultaneously. The timeline is very tight but we are going to squeeze in three rounds of user testing.

With such a short timeline, I would like to avoid having to prototype, screen, recruit, create test plans, and coordinate participants for both iOS and for Android if at all possible.

Will this be a big miss for me if I focus on one of the platforms and use those findings to inform the MVP for both? The design should be pretty straight forward, not using many uncommon interactions.