Exploratory testing

Exploratory testing is testing where the tester designs and runs tests at the same time, learning about the product as they go instead of following a fixed script. It relies on the tester’s skill and curiosity to find problems that scripted tests miss.

How to run a session

• Write a short charter, such as “Explore checkout with expired cards to find payment errors”.
• Set a time box, for example 60 to 90 minutes.
• Take notes on what you tried, what you saw and any bugs or questions.
• Debrief afterwards and turn useful findings into bug reports or automated checks.

Why it still matters with AI and automation

Automated tests only check what someone thought to write down. Exploratory testing finds the unexpected: confusing flows, odd data and, in AI apps, strange or unsafe model answers. It complements test automation rather than competing with it.

Read the full guide: SDET vs QA Engineer — Which Pays More in 2026?