Some of our courses do include a practice quiz based on the course content, but you can't fail.
Some of our courses do have practice quizzes as a part of the course content (some states and jurisdictions require quizzes as a part of the course approval).
However, these quizzes are not pass/fail quizzes. You will be required to answer 85% of the questions correctly to proceed. If you do not answer 80% correctly, you'll be required to retake the quiz. Before retaking the quiz, you'll have an opportunity to see the questions you answered incorrectly (and see the correct answers).