Mmm, I have mixed feelings about the Bechdel test as a tool, to be honest, at least for the purpose of criticizing any individual story--after all, passing the Bechdel test doesn't make your story "feminist", it just makes it a story where two women talk to each other about something other than men at one point. It can easily be misogynistic in every other way.
You say "just!"
The idea is that depicting women with agency as full human beings -- able to have a conversation without depending on men to make it important or real -- is by itself a thing of importance: even, that it's more fundamentally upsetting of the Established Order of Things than simply saying or not saying certain kinds of things.
For example, a tv series about 4 women who seem very independent and self-actualized and say lots of self-actualized-sounding things -- but every conversation they have, no matter how sassy, is always about sex with men or romance with men or problems with men. They have no life, as characters, outside of men.
Versus a movie in which two women develop an intense, antagonistic, but eventually grudging mutually respectful work relationship in the field of high fashion, and spend lots of time talking and arguing about clothes, shoes, belts, and handbags.
The classic Andrea Dworkin type viewpoint would say that the second one is bad because the subject matter is on a checklist of bad, misogynistic topics. But topics aren't misogynistic -- people are.
In practice it
doesn't seem easy to pass the test as a writer and be a misogynist -- it appears to be very difficult if not impossible for people with real misogynistic streaks to write these kinds of character interactions in the first place. In fact it appears to be easier to recite the things you're "supposed" to say than to structurally change the gender dynamic. (Yes, Kathryn Bigelow, that means you too.)
At least that's been my observation!