According to the Wisconsin Nurse Aide Registry, if an individual has not passed both parts of the NNAAP Examination within one year from successfully completing a CNA training program, then she must successfully complete a new nurse aide training program and retake the test. An individual may retake the part(s) of the examination that they failed as many times as they wish within that one year time period. You may contact the Wisconsin Department of Health Services at 877.329.8760 or at 608.261.8319 if you would like to verify this information.