Proximity-based Testing
Proximity-based testing is an experience-based test technique that focuses testing on areas located near recently discovered defects or historically defect-prone components.
“A test type to confirm that sensors can detect nearby objects without physical contact.”
(Definition reproduced from the ISTQB Glossary. Copyright belongs to ISTQB.)
View the complete ISTQB GlossaryWhat is Proximity-based Testing?
The technique assumes that defects often occur close to other defects because of shared code, dependencies, or implementation complexity.
Defect clustering: Nearby code may contain similar defects.
Experience driven: Testers use previous defect knowledge.
Risk focus: Testing expands around affected areas.
Real World Example
A regulated product team is preparing a release where Proximity-based testing appears in reviews, test design conversations, or defect triage rather than as an isolated glossary word.
The risk is that the team treats Proximity-based testing as interchangeable with nearby ISTQB terms. That makes test scope blurry and can lead to weak evidence for the release decision.
The tester anchors the discussion in the official definition, asks where the concept appears in the product, and designs examples that show the difference between Proximity-based testing and similar ideas.
The page becomes useful in practice because Proximity-based testing is connected to a specific testing decision, not memorized as a detached definition.
Practice Questions
Question 1
Which statement BEST describes Proximity-based testing in the context of ISTQB terminology?
Question 2
A tester needs to explain Proximity-based testing to a non‑technical stakeholder. Which approach is MOST appropriate?
Test your knowledge with real ISTQB-style questions
You’ve learned Proximity-based Testing. Test your understanding with topic-specific questions in our Mock Exams.