Using Khan Academy to prep for College Algebra CLEP?

[muranternet]

I am trying to prepare for this CLEP to fulfill a requirement at a community college (they don't take ALEKS, and College Mathematics is only worth an elective). I've been going through Khan Academy self-testing and some videos for all math subjects up through Algebra II/Prob and Stat/Geometry/Trig. However, whenever I look at different practice exams the material seems wildly variable. Is there a way to focus Khan practice on College Algebra, or is there a practice test that is considered more reliable so I can work from that? Thanks.