Chapter 6 – Test Tools
Comparator – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A test tool that compares two files, databases or sets of test results.
In simple words
A diff engine used to compare actual vs expected output automatically.
Exam tip
Snapshot and visual regression tools are modern comparators.
Related terms
- Visual TestingCompare screenshots against baselines to catch UI regressions that functional tests miss.
- Test OracleWhatever tells you what the ‘right’ answer should be — a requirement, a spec, a previous version, or even an experienced user.
- Regression TestingAfter any change — bug fix, new feature, config update — you re-run existing tests to make sure nothing that used to work has broken.
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