Labs validate the RNG's randomness by running statistical tests, confirming that game outcomes match expected probability distributions, thus suggesting there are no manipulation or foreseeable patterns. This involves assessing the statistical randomness of outcomes, the RNG's internal state for integrity, and its seeding, re-seeding, and cycling processes to ensure unpredictability. The non-repeatability of outcomes is also evaluated to thwart pattern formation and scrutinize the RNG's scaling and shuffling of random numbers to guarantee unbiased application in games.