Chapter 2 – Testing Throughout the SDLC
Shift-Left Testing – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
An approach in which testing is performed earlier in the software development lifecycle.
In simple words
Start testing — reviews, unit tests, static analysis — as early as possible, not at the end.
Exam tip
Shift-left reduces the cost of defects and pairs naturally with static testing and TDD.
Related terms
- Static TestingYou examine the work product — requirements, design, code — without running it, using reviews or tools like linters.
- Test-Driven DevelopmentRed-green-refactor: write a failing test, make it pass with the simplest code, then clean up.
- Shift-Right TestingKeep testing after release — observe real users, run experiments, catch issues in production safely.
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