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`exit()` may silently break your parallel tests

The author upgraded to Pest 5 and its new TIA engine, then spent hours tracking down legacy issues that silently broke their test suite. The post explains how a call to exit() can quietly undermine parallel tests and what to check for in your own codebase.

dyrynda.com.au10 Aug 2026 · 1 min read · summary
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I recently upgraded our app to use Pest 5 and leverage it's new TIA engine. What should have been a straightforward performance win turned into a multi-hour debugging session, uncovering a chain of legacy issues that silently broke our test suite.

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