MENTAL MODEL · M6307

Regression Testing

TechnicalHigh supportSoftware Engineering

Included

Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

After modifying old code or adding new features, re-run previous test cases to ensure that 'new changes have not broken old functionality' (no regression).

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

Hold the baseline. In self-improvement or organizational change, we often focus on 'what's new learned' and ignore 'whether we've forgotten our original expertise'. After each progress, conduct regression testing to ensure the fundamentals (core capabilities/values) haven't collapsed.

anchor

Anchor fast decisions

Regression testing is re-running existing test cases after code changes to confirm that new modifications haven't broken existing functionality. It protects 'previously correct behavior' from being unintentionally broken and is a cornerstone of continuous integration.

MINIMUM ACTION

In progress 0/5

Practice this model in one real situation:

Build a repeatable test suite
after each change, run the full suite or the affected subset (based on impact analysis)
prioritize automated high-frequency regression
for failures, determine whether it's a bug or outdated test
incorporate into CI gates.

Check to track your progress (stored locally)

Learning progress0%

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Source support: Explicit

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en.wikipedia.orghttps://en.wikipedia.org/wiki/Regression_testingZH · Explicit
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