Indeed, atheism itself has a number of propositions that have to be accepted by faith, e.g. that something (the universe) came from nothing, non-living matter evolved into living cells by stochastic chemistry, complex specified information arose without intelligence, morality arose by natural selection, etc.
Cosner, L. (2008). ‘Former leading atheist argues for the existence of God‘ in Journal of Creation. December 2008, pp. 21-24.