Software → quality-assurance
Regression Test
A test intended to catch behavior that used to work but was broken by later changes.
Motivation
Regression Test matters because it gives teams a shared way to reason about a test intended to catch behavior that used to work but was broken by later changes.
Where it fits
Regression Test belongs to the software track and the Quality Assurance layer. It is useful when teams need to connect design decisions to practical engineering work.
Mental model
Think of Regression Test as a named pattern in the engineering map: it explains what problem is being solved, what boundaries are involved, and what tradeoffs appear when systems grow.
Common mistakes
- Treating the term as a buzzword instead of tying it to concrete behavior.
- Ignoring the operational, security, or product constraints around it.
- Learning the definition without knowing where it appears in real systems.