singleton-scope

Using StructureMap, how do you explicitly trigger the reinstantiation of a object with InstanceScope.Singleton?

I have an integration test harness where I want to teardown and then re-instantiate some of the singleton-scoped objects I've registered with StructureMap, after and before each test. This way I can simulate the actual run time environment, but not have the singleton's state being passed from one test to another. Maybe this isn't a g...