Tester
A tester is a person who plans, designs, executes, and evaluates tests to verify software quality and identify defects.
“A person who performs testing.”
(Definition reproduced from the ISTQB Glossary. Copyright belongs to ISTQB.)
View the complete ISTQB GlossaryWhat is Tester?
Testers apply testing techniques, analyze results, report defects, and collaborate with stakeholders to improve product quality.
Quality advocate: Focuses on verifying software behavior.
Analytical role: Identifies defects and risks.
Collaboration: Works closely with developers and business stakeholders.
Real World Example
A regulated product team is preparing a release where Tester appears in reviews, test design conversations, or defect triage rather than as an isolated glossary word.
The risk is that the team treats Tester as interchangeable with nearby ISTQB terms. That makes test scope blurry and can lead to weak evidence for the release decision.
The tester anchors the discussion in the official definition, asks where the concept appears in the product, and designs examples that show the difference between Tester and similar ideas.
The page becomes useful in practice because Tester is connected to a specific testing decision, not memorized as a detached definition.
Practice Questions
Question 1
Which statement BEST describes Tester in the context of ISTQB terminology?
Question 2
A tester needs to explain Tester to a non‑technical stakeholder. Which approach is MOST appropriate?
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