You can use the sandbox of sinon, this allows automatically restore all spies/stubs.

Create the sandbox in global scope:

```js
beforeEach(function() {
  this.sinon = sinon.sandbox.create();
});

afterEach(function() {
  this.sinon.restore();
});
```

In describe scope:

```js
beforeEach(function() {
  this.channelStub = this.sinon.spy(Backbone.Radio, 'channel');
});
```