Hi, how about this site? 

http://www.tanos.co.uk/jlpt/aboutjlpt/

Hey Marcus,

Here is a website that has some practice tests in every level of the JLPT

http://www.jlpt.jp/e/samples/forlearners.html ;

And if you want more questions then it is a good idea to follow the JLPT (at your level) on twitter.

They post questions there which can be really helpful.

Good Luck with your Studies!