elastic-agent supports finding issues in Elastic Agent logs. We have had some regressions and fixes around there, that could have been detected earlier by negative tests.

We should find a test case that can be used for negative tests. One challenge for this is that these issues use to be related to specific versions of the stack, and we always test now with the default version of the stack.

For example we know that prometheus package had issues in 8.12.0, but these issues were caused by a regression in the stack.