"pass all tests" means "appears to be uniformish" (or more specifically "not obviously non-uniform in the ways we checked")

So for example "transaction fees" - we do not expect these to be uniformly distributed, and surely enough, they did not pass the tests for uniformity (which is "as expected" since they're not randomly selected)

The fees failed the centrality test for example, which given an array `X` containing all values or a given used on the blockchain, checks whether `mean(X) = max(x) - min(x)` give or take some parts per million threshold

(in the case of fees, the sides of those equations are not close to equal)