How to select tests that need to be performed manually?

Manual testing should be chosen for scenarios where:

• Evaluation of user experience, interface usability, and visual aspects is required.
• Tests are difficult or not feasible to automate due to frequent requirement changes.
• To verify non-standard or rare scenarios that are hard to formalize.
• Exploratory testing is needed to identify unexpected errors.

Thus, manual testing is suitable for checking new features, UX, and regression testing when automation is not yet set up.