stubHttp.Stub(x => x.Get("/api/path")).Return("PATH").OK();
stubHttp.Stub(x => x.Get("/api/path/one")).Return(expectedResponse).OK();
var result = new WebClient().DownloadString(string.Format("{0}/api/path/one", _hostUrl));
Assert.That(result, Is.EqualTo(expectedResponse));
The order of the stubs should not matter