retry := true
	for retry && !t.Failed() {
		var srvWG sync.WaitGroup
		inHandler := make(chan bool, 1)
		mux := NewServeMux()
		mux.HandleFunc("/fast", func(w ResponseWriter, r *Request) {
			inHandler <- true
			srvWG.Done()
		})
		mux.HandleFunc("/slow", func(w ResponseWriter, r *Request) {
			inHandler <- true
			<-r.Context().Done()
			srvWG.Done()
		})

}
func testServerRequestContextCancel_ConnClose(t *testing.T, mode testMode) {
	inHandler := make(chan struct{})
	handlerDone := make(chan struct{})
	ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		close(inHandler)
		<-r.Context().Done()
		close(handlerDone)
	})).ts
	c, err := net.Dial("tcp", ts.Listener.Addr().String())