flowtype typeof class does not work as expected

Below code does not typecheck. THe error says:

"Cannot assign new YourClass() to test1 because YourClass [1] is incompatible with class YourClass [2]."

/* @flow */

class YourClass {
  method(){}
}

let test1: typeof YourClass = new YourClass();

What exactly does typeof SomeClass infer to?

Can someone explain what is going on?