Regression tests ensure that old features continue to work after new changes. In digital products, regression is one of the biggest causes of bugs in production. Each business model has different critical flows, and the regression needs to be adapted to these flows.
This guide presents the fundamentals of regression testing and how to apply it to different business models.
What is regression
Regression is when something that used to work stops working after a change. Regression testing prevents this by validating essential flows in each release.
Why regression matters
A bug in critical flow can cause immediate loss. Examples:
- Broken checkout in ecommerce.
- Unstable login in SaaS.
- Payment declined on financial apps.
Regression affects revenue and reputation.
Business models and regression
Ecommerce
Critical flows: cart, checkout, payment.
SaaS
Critical flows: login, project creation, billing.
###Marketplace
Critical flows: publication, purchase, delivery.
Each model requires specific tests.
Fundamentals of regression
- Define main flows.
- Create clear test cases.
- Execute in each release.
- Automate when possible.
These fundamentals guarantee basic protection.
Quick checklist
- Main flow tested?
- Updated test cases?
- Critical bugs fixed?
- Release validated?
If something is missing, the regression can escape.
Conclusion
Regression testing is fundamental for any business model. They protect the core of the product and prevent losses. By applying fundamentals and adapting to the model, the team gains reliability.
This guide provides a clear foundation for structuring value-focused regression.