The SAT is a standardized test for most college admissions in the United States.
On the SAT website you can practice for the SAT exam in Japanese.
I think that the short listening comprehension is very useful as you can click a button and see the (Japanese) script for the dialogues as well.
There is English (romaji) for most of the reading questions which I think is odd because it is recommended that you have 2–4 years of Japanese language study in high school, or the equivalent, before taking the test and I assumed that learning Japanese scripts was absolutely essential from the start.
You don't have to be a member of the website to use the practice tests and the there are many subjects to choose from apart from Japanese.
As far as Japanese is concerned I think that, even at beginner level 5, the JLTP is definitely more challenging!