Chapter 4 – Test Techniques
All-Pairs Testing – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A combinatorial testing technique that tests every possible pair of input values at least once.
In simple words
Cover every pair of parameter values instead of every combination.
Exam tip
Same as pairwise testing; huge reduction in test count with strong defect detection.
Related terms
- Pairwise TestingInstead of testing every combination, test every pair of inputs at least once — catches most combination bugs with far fewer tests.
- Combinatorial TestingA family of techniques (pairwise, orthogonal arrays, classification tree) that shrink an exploding combination space to a manageable subset.
- Equivalence PartitioningGroup inputs that the system should treat identically, then pick one value from each group. That way you cover behaviour without testing every possible value.
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