# Chaos compatibility testing?

**URL:** <https://discourse.julialang.org/t/chaos-compatibility-testing/110360>\
**Category:** General Usage\
**Tags:** question\
**Created:** [February 18, 2024, 12:05am UTC](https://discourse.julialang.org/t/chaos-compatibility-testing/110360 "2024-02-18T00:05:00Z")\
**Posts on this page:** 1\
**Showing post:** 16

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**Author:** ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Post date:** [February 18, 2024, 1:14pm UTC](https://discourse.julialang.org/t/chaos-compatibility-testing/110360/16 "2024-02-18T13:14:21Z")

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> [@aplavin](#):
>
> I think it’s unambiguous that testing downgrades of direct + indirect deps is strictly better and leads to more reliable ecosystem than testing direct deps downgrades only. And the most direct way to do that would be just to flip the sign in the Pkg resolver (:

Oh I agree, and the discussion in [PSA: Add Downgrade CI to Better Check Version Compatibility - #33 by Mason](https://discourse.julialang.org/t/psa-add-downgrade-ci-to-better-check-version-compatibility/110063/33) is to have the downgrade CI be updated to do exactly that (discussion in pkg-dev as well)

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