Chapter 6 – Test Tools
Mock Server – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A tool that simulates the behavior of a real API or service to enable testing without the actual dependency.
In simple words
A fake API you control so tests aren’t blocked by real backends.
Exam tip
WireMock, Mockoon, and MSW are common mock servers used in test suites.
Related terms
- StubFake code you drop in for a not-yet-built dependency so your module can be tested.
- Service VirtualizationFake entire services (payments, third-party APIs) so tests aren't blocked by them.
- API TestingTesting at the service boundary — sending requests to endpoints and asserting responses — without a UI.
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