}{
			{path: "/fast"},
			{path: "/slow", wantTimeout: true},
			{path: "/fast"},
		}
		for i, tt := range tests {
			req, _ := NewRequest("GET", ts.URL+tt.path, nil)
			req = req.WithT(t)
			res, err := c.Do(req)
			<-inHandler
			if err != nil {
				uerr, ok := err.(*url.Error)
				if !ok {
					t.Errorf("error is not a url.Error; got: %#v", err)
					continue
				}