Chapter 5 – Managing the Test Activities
Test Level – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A specific instantiation of a test process. Common levels are component, integration, system, and acceptance testing.
In simple words
One of the layers of testing: unit, integration, system, acceptance.
Exam tip
Levels are about the object under test; test types are about what you're testing (functional, performance, etc.).
Related terms
- Component TestingTesting the smallest testable pieces of code (a function, class, or module) in isolation, usually by developers.
- Integration TestingAfter units work alone, you plug them together and check the seams — API calls, data hand-offs, contracts.
- System TestingEnd-to-end testing of the fully integrated product against its requirements, usually in a production-like environment.
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