Chapter 4 – Test Techniques
Red-Green-Refactor – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
The three-step cycle of test-driven development: write a failing test (red), make it pass with minimal code (green), then improve the design (refactor).
In simple words
Write a failing test, make it pass, then clean it up. Repeat.
Exam tip
This tight loop is the essence of TDD — skip refactor and code rots.
Related terms
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