CI is erroring on uncaught deprecation and future warnings but that's hard to reproduce locally unless you really know what you're doing.

I feel like we should make this easier, or maybe even the default when running tests locally?

One way would be to do this in the makefile, which would only help if using make, but that already would be better, I think.

We could also add it to the configuration, not sure if that's overkill?

It's a bit annoying to have tests pass locally but then not on CI because it uses different flags [yes yes, I added these flags, I know].