What do you mean by “fail”? If by failing you mean the returned value does not match {:ok, _}, please tell us what it is instead. It might help to resolve the issue.

Sure, agreed. I didn’t address most of my comment towards you, sorry. Just now noticed I pressed the wrong button.

I was just pointing out that the OP is trying to solve the wrong problem, in my opinion.

hey, thanks for all the responses, i did not know that i can or should adjust the behavior of my validation in case it is being run in test env.
if that is the case, how would one go about that? I am using it in a changeset function to validate url input from users.
On the same note, if I am not running it in test mode, how do i know for sure that it works in a way that i’d expect?
Also what i am most surprised by, is that it runs perfectly most of the time like 99.8%. My other idea was that it might have to do with not having the most stellar internet, since it only seems to happen when I am running the tests locally, in the deployment pipeline it hasn’t failed yet . As for changing my dns, I am using that dns on router level, and I haven’t seen the tests fail since.