As Agile methodologies depend heavily on collaboration, communication, and interaction between the team members as well as stakeholders outside the team, testers in an Agile team should have good interpersonal skills. Testers in Agile teams should:

• Be positive and solution-oriented with team members and stakeholders.
• Display critical, quality-oriented, skeptical thinking about the product.
• Actively acquire information from stakeholders (rather than relying entirely on written specifications)
• Accurately evaluate and report test results, test progress, and product quality
• Work effectively to define testable user stories, especially acceptance criteria, with customer representatives and stakeholders.
• Evaluate existing test scenarios and test plans.
• Collaborate within the team, working in pairs with programmers and other team members.
• Respond to change quickly, including changing, adding, or improving test cases....