Tests trigger `unknown registry: MyApp.EventStore.EventStore.PubSub` while migrating to Elixir 1.15

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I did a little digging. There is this stackoverflow question with similar issue.

Turns out the issue was in my children array. Since application order DOES MATTER, my PubSub child should be before Endpoint:

But I don’t see why would version bump be related to this. :thinking:
Also somebody in the comment’s comment referenced this elixirforum thread
where they resolve issues with phoenix changes.

So if your app has phoenix consider bumping that as well and research what changes were made. Just an idea. :bug: