diff --git a/http/httphi/httphi.go b/http/httphi/httphi.go
index 9414a32..9590955 100644
--- a/http/httphi/httphi.go
+++ b/http/httphi/httphi.go
@@ -41,7 +41,7 @@ type job struct {
 }
 
 type Mux interface {
-	Handler(get Method, uri []byte) HandlerFunc
+	LookupHandler(get Method, uri []byte) HandlerFunc
 }
 
 type RouterConfig struct {
@@ -196,7 +196,7 @@ func (r *Router) goroHandle(exch *Exchange, backoff lneto.BackoffStrategy, mux M
 	// Mux URI.
 	uri := reqhdr.RequestURI()
 	meth := reqhdr.Method()
-	handler := mux.Handler(MethodFromBytes(meth), uri)
+	handler := mux.LookupHandler(MethodFromBytes(meth), uri)
 	if handler != nil {
 		handler(exch)
 	}
diff --git a/http/httphi/router_test.go b/http/httphi/router_test.go
new file mode 100644
index 0000000..5bbf98b
--- /dev/null
+++ b/http/httphi/router_test.go
@@ -0,0 +1,127 @@
+package httphi
+
+import (
+	"bytes"
+	"context"
+	"io"
+	"net"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/soypat/lneto"
+	"github.com/soypat/lneto/internal"
+)
+
+type rwconn struct {
+	readable bytes.Buffer
+	written  bytes.Buffer
+	closed   bool
+	deadline time.Time
+}
+
+func (r *rwconn) Close() error {
+	r.closed = true
+	return nil
+}
+func (r *rwconn) Read(b []byte) (int, error) {
+	if r.closed {
+		return 0, net.ErrClosed
+	} else if r.deadlineExceeded() {
+		return 0, context.DeadlineExceeded
+	}
+	return r.readable.Read(b)
+}
+func (r *rwconn) Write(b []byte) (int, error) {
+	if r.closed {
+		return 0, net.ErrClosed
+	} else if r.deadlineExceeded() {
+		return 0, context.DeadlineExceeded
+	}
+	return r.written.Write(b)
+}
+func (r *rwconn) deadlineExceeded() bool {
+	return !r.deadline.IsZero() && time.Since(r.deadline) > 0
+}
+func (r *rwconn) AddReadable(b []byte) { r.readable.Write(b) }
+func (r *rwconn) ViewWritten() []byte  { return r.written.Bytes() }
+
+var _ Mux = (*sliceMux)(nil)
+
+type sliceMux struct {
+	_handlers []struct {
+		method  Method
+		uri     string
+		handler HandlerFunc
+	}
+}
+
+func (sm *sliceMux) LookupHandler(method Method, uri []byte) HandlerFunc {
+	for _, endpoint := range sm._handlers {
+		if endpoint.method != MethUndefined && endpoint.method != method {
+			continue
+		}
+		// Method matches.
+		if b2s(uri) == endpoint.uri {
+			return endpoint.handler
+		}
+	}
+	return nil
+}
+func (sm *sliceMux) Handle(reg string, handler HandlerFunc) {
+	v := internal.SliceReclaim(&sm._handlers)
+	method := MethUndefined
+	methodOrURL, url, methodFound := strings.Cut(reg, " ")
+	if methodFound {
+		method = MethodFromBytes([]byte(methodOrURL))
+	} else {
+		url = methodOrURL
+	}
+	v.method = method
+	v.uri = url
+	v.handler = handler
+}
+
+func configSynchronousRouter(t *testing.T, router *Router, bufferSize int, mux Mux) {
+	err := router.Configure(RouterConfig{
+		FixedNumGoroutines:    -1,
+		Mux:                   mux,
+		RequestBufferSize:     bufferSize,
+		ResponseMinBufferSize: bufferSize,
+		Backoff: func(consecutiveBackoffs uint) (sleepOrFlag time.Duration) {
+			return lneto.BackoffFlagNop
+		},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestRouterGet(t *testing.T) {
+	const bufferSize = 1024
+
+	const expectResponse = "its time"
+	var (
+		sm     sliceMux
+		router Router
+		conn   rwconn
+	)
+	conn.deadline = time.Now().Add(10 * time.Millisecond) // TODO: remove after tests run without blocking forever.
+	sm.Handle("GET /", staticPage(t, expectResponse))
+	configSynchronousRouter(t, &router, bufferSize, &sm)
+	err := router.Handle(&conn)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func staticPage(t *testing.T, page string) HandlerFunc {
+	return func(ex *Exchange) {
+		n, err := io.WriteString(ex, page)
+		if err != nil {
+			t.Fatal(err)
+		} else if n != len(page) {
+			t.Fatal("expected written ", len(page), "got", n)
+		}
+	}
+}