Using FakeItEasy to have a faked method call raise an event?

I'm trying to do something along the lines of: ``` A.CallTo(() => fakeTimer.Start()).Invokes(() => fakeTimer.Elapsed += Raise.With<ElapsedEventArgs>(ElapsedEventArgs.Empty).Now); ``` The `fakeTimer` is a fake of `ITimer`, a wrapper interface per this answer. Obviously this doesn't work, since I cannot do an assignment inside an Experssion Tree. What I am actually tying to achieve is simulating raising timer events when the `Start` method was called. This way I can assert that a call to `Start` indeed happened. Any (alternative) ideas? Edit I'm an idiot and the fault is my own! I accidentally added an extra `A.CallTo`, where I shouldn't have. Instead of deleting this question, I'll keep it to award Patrik Hägne his rightful reputation :)