How do you keep integration tests reliable without turning them into slow, brittle UI scripts?

What’s up everyone? I’m in the middle of tightening up our frontend release process, and I’m trying to make our integration tests actually catch regressions without becoming a flaky time sink.

Right now we lean on “happy path” UI flows and a few network mocks, but failures keep coming from timing and state leakage between tests, and the fixes usually make the suite slower and less realistic; how do you draw the line on what to mock vs run real, and what guardrails keep the suite trustworthy over time?

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