# Hermetic test

Term `hermetic-test`. Isolate a test from mutable external conditions to improve determinism and reproduction.

Practitioner: Titus Winters, Tom Manshreck, Hyrum Wright. Read in: *Software Engineering at Google*, CI Is Alerting.

## Skills
- [uncomplect](/skills/uncomplect)

## Sources
- Winters, Titus; Manshreck, Tom; Wright, Hyrum, editors. *Software Engineering at Google: Lessons Learned from Programming Over Time*. O’Reilly, 2020. [Link](https://abseil.io/resources/swe-book). ([b15-software-engineering-at-google](/bibliography#b15-software-engineering-at-google))