Fix endian-dependence of test introduced in gh-16380 - #16391

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cc @pllim: sorry for introducing the bug, but at least now you know the cron failures will be temporary!

Hmm but "exotic" archs still have failures. Are they related?

Good point, I missed that. Looks like a completely separate problem to me, more likely linked to #16346, but I'm confused why we're only seeing it here.

@pllim can we manually trigger weekly cron on main now just to check that the problem is reproducible outside this branch ?

Yes. But might take a few hours: https://github.com/astropy/astropy/actions/runs/8970422440

For the jobs that completed, I do see the failures on main too. Hmm...

Now it's there !
I think we can go ahead with this one, and I can dig into remaining failures tomorrow !

Just to be sure, the dask failures in pre-deps are also unrelated, right?

https://github.com/astropy/astropy/actions/runs/8962574869/job/24611632967?pr=16391

Yeah, it's not.

Yes, dask failures were solved in #16384

Yes, it is green now. Thanks! https://github.com/astropy/astropy/actions/runs/8974310244

Thanks @pllim and @neutrinoceros!