// other test to see an unexpected extra connection.
				defer func() {
					cancel()
					<-dialDone
				}()

				go func() {
					defer close(dialDone)
					d := Dialer{}
					c, err := d.DialContext(ctx, ln.Addr().Network(), ln.Addr().String())
					if err != nil {
						// If the timing didn't work out, it is possible for this Dial