Advanced – Non-Functional Testing
Fail Fast – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A design principle where systems detect and report errors as early as possible rather than continuing in an invalid state.
In simple words
Crash immediately on bad input instead of limping along.
Exam tip
Fail-fast makes bugs visible early — cheaper to fix than silent corruption.
Related terms
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