Advanced – Non-Functional Testing
Fault Tolerance – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
The degree to which a system operates as intended despite the presence of hardware or software faults.
In simple words
Keeps working even when parts fail.
Exam tip
Chaos engineering is a modern way to test fault tolerance.
Related terms
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