In spite of many great testing “how-to” books, people involved with system and software testing—testers, requirements engineers, system/software architects, system and software engineers, technical leaders, managers, and customers—continue to make many different types of testing-related mistakes. Think of these commonly-occurring human errors as a system of software testing pitfalls. And when projects fall into these pitfalls, testing is less effective at uncovering defects, people are less productive when testing, and project morale is damaged.