I few tips:
1) Definitely look at material for the McKinsey PST and BCG Online test. While it won't be identical, the logical reasoning skills and general flow should be similar. If you need a sample BCG Online Test shoot me a message.
2) Make sure you're very familiar with finance / accounting terms and formulas. You're likely going to need to really understand these and be able to handle nuances and overloading over information in utilizing these formulas. Happy to send you through the key formulas you'll likely need.
3) Generally practice fast math and chart reading