sinon.js stubs are reset, before tearDown

Executing this test (stub-test.js):

"use strict";

var buster = require("buster"),
    assert = buster.assert,
    refute = buster.refute;

buster.testCase("stub reset test", {

    setUp: function () {
        this.server = {
            close: function () {
                throw new Error("server is not running");
            }
        };
        this.stub(this.server, "close");
        refute.exception(this.server.close);
    },

    tearDown: function () {
        refute.exception(this.server.close);
    },

    "method close should be stubbed": function () {
        refute.exception(this.server.close);
    }
});

leads to the following result:

Failure: stub reset test method close should be stubbed
  [refute.exception] Expected not to throw but threw Error (server is not running)
    AssertionError: [refute.exception] Expected not to throw but threw Error (server is not running)
          at Object.referee.fail (D:\busterDev\referee\lib\referee.js:156:25)
          at Object.fail (D:\busterDev\referee\lib\referee.js:43:17)
          at Function.refute.exception (D:\busterDev\referee\lib\referee.js:562:18)
          at Object.buster.testCase.tearDown (D:\busterDev\buster-ci\test\stub-test.js:20:16)
          at asyncFunction (D:\busterDev\buster-test\lib\test-runner.js:224:19)
          at callAndWait (D:\busterDev\buster-test\lib\test-runner.js:253:23)
          at next (D:\busterDev\buster-test\lib\test-runner.js:273:31)
          at callSerially (D:\busterDev\buster-test\lib\test-runner.js:279:9)
          at Object.bane.createEventEmitter.callTearDowns (D:\busterDev\buster-test\lib\test-runner.js:589:20)
          at Object.<anonymous> (D:\busterDev\buster-test\lib\test-runner.js:626:17)
1 test, 2 assertions, 1 runtime ... 1 failure

As you can see, the failure occurs in line 20 of the test, which is inside of tearDown. Question is, what is more useful, to reset the stubs before or after tearDown?

busterjs / buster

sinon.js stubs are reset, before tearDown #424