Advice for someone taking the Sat Spanish Subject Test

Question

I know someone who is looking to take the SAT subject test in the next year or so. They are not a native speaker, and have only taken Spanish as a second language for 3 years or so. Much of their Spanish skills are derived from immersion more than true study per say, although they have taken 3 years of Spanish. They understand spoken Spanish sufficiently, well enough to have a sense of syntax and just what "sounds right" on the Spanish listening section of the SAT subject test. Any advice on what to work on as preparation for the test? Any other people on SpanishDict who have taken the test?