Chapter 4 – Test Analysis and Design
Black-Box Testing – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
Testing, either functional or non-functional, without reference to the internal structure of the component or system.
In simple words
You design tests only from the spec or behaviour — inputs and expected outputs — without looking at the code.
Exam tip
BVA, EP, decision tables, state transition and use-case testing are all black-box techniques in CTFL v4.0.
Related terms
- Boundary Value AnalysisBugs cluster at the edges of allowed ranges. So if a field accepts 1–100, you test 0, 1, 100, and 101 instead of only picking a value from the middle.
- 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.
- White-Box TestingYou design tests using knowledge of the code — branches, statements, paths — to hit specific structural coverage targets.
Practice this term in the ISTQB Mock Test
40 CTFL v4.0 questions, 60-minute timer, instant scoring and chapter-wise breakdown.
Practice in Mock Test