[plt-scheme] Setup and teardown in SchemeUnit

Hi,

I'm looking for something along the lines of setup and teardown
methods, as implemented in most xUnit frameworks. They run before and
after each test case belonging to given test suite. Is that
functionality available in SchemeUnit? In documentation I've only
found "before" and "after" procedures of the test-suite, but those run
only once for the whole suite.

Cheers,
mk