**Describe the bug**
Unit test case failed :
  1) supports http with nodejs
       should pass errors for a failed stream:
     Error: Timeout of 30000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (***************...

**To Reproduce**
Use VS Code internal terminal to excute the unit test .

**Expected behavior**
UT should be excuted correctly.

**Environment:**
 - Axios Version: latest master
 - OS Version: Window 10

**Additional context/Screenshots**
![Capture](https://user-images.githubusercontent.com/46782518/70436361-136c5380-1ac4-11ea-87b5-203b2e46ebbf.PNG)

test/unit/adapters/http.js
validateStatus: function () {
          return true;
        }
      }).then(function (res) {
        assert.equal(res.status, 302);
        assert.equal(res.headers['location'], '/foo');
        done();
      });
    });
  });
  it('should support max redirects', function (done) {
    var i = 1;
    server = http.createServer(function (req, res) {
      res.setHeader('Location', '/' + i);
      res.statusCode = 302;
      res.end();
      i++;
    }).listen(4444, function () {
      axios.get('http://localhost:4444/', {
        maxRedirects: 3
      }).catch(function (error) {
        done();
      });
    });
  });
  it('should preserve the HTTP verb on redirect', function (done) {
    server = http.createServer(function (req, res) {
      if (req.method.toLowerCase() !== "head") {
        res.statusCode = 400;
        res.end();