The Bechdel Test was invented as a mostly humorous way to highlight the lack of meaningful female main characters in films by blogger Julie (I think?) Beschdel. As a bar to leap over, having two female named characters discuss something other than boys isn't a particularly high one.
Obviously it isn't a hard and fast rule as Alien and Gravity would fail but quite a few porn films would pass. Some people do ttake it too seriouslybut most feminists realise that it was just a crude tool for pointing out a general problem, rather than a clinical tool to examine the feminist credentials of a film.