diff --git a/docs/hello-state/api.go b/docs/hello-state/api.go
index c1e201d..d0f3b48 100644
--- a/docs/hello-state/api.go
+++ b/docs/hello-state/api.go
@@ -17,6 +17,7 @@ func main() {
 			panic(err)
 		}
 
+		res.Header().Add("Content-Type", "application/json")
 		if err := json.NewEncoder(res).Encode(map[string]string{
 			"message": fmt.Sprintf("Hello %s! (request n°%d)", params["name"], no),
 		}); err != nil {
diff --git a/docs/hello-state/api.wasm b/docs/hello-state/api.wasm
index ff4dec6..4c976cd 100755
Binary files a/docs/hello-state/api.wasm and b/docs/hello-state/api.wasm differ
diff --git a/docs/hello/api.go b/docs/hello/api.go
index 0c0ae18..8b25e4f 100644
--- a/docs/hello/api.go
+++ b/docs/hello/api.go
@@ -15,6 +15,7 @@ func main() {
 			panic(err)
 		}
 
+		res.Header().Add("Content-Type", "application/json")
 		if err := json.NewEncoder(res).Encode(map[string]string{
 			"message": fmt.Sprintf("Hello %s!", params["name"]),
 		}); err != nil {
diff --git a/docs/hello/api.wasm b/docs/hello/api.wasm
index d3cf2f8..12f64a5 100755
Binary files a/docs/hello/api.wasm and b/docs/hello/api.wasm differ
diff --git a/request.go b/request.go
index 9ebc204..2e4ae34 100644
--- a/request.go
+++ b/request.go
@@ -3,6 +3,7 @@ package wasmhttp
 import (
 	"bytes"
 	"net/http"
+	"net/http/httptest"
 	"syscall/js"
 )
 
@@ -12,14 +13,11 @@ func Request(r js.Value) (*http.Request, error) {
 	body := make([]byte, jsBody.Get("length").Int())
 	js.CopyBytesToGo(body, jsBody)
 
-	req, err := http.NewRequest(
+	req := httptest.NewRequest(
 		r.Get("method").String(),
 		r.Get("url").String(),
 		bytes.NewBuffer(body),
 	)
-	if err != nil {
-		return nil, err
-	}
 
 	headersIt := r.Get("headers").Call("entries")
 	for {
diff --git a/response_recorder.go b/response_recorder.go
new file mode 100644
index 0000000..855fde2
--- /dev/null
+++ b/response_recorder.go
@@ -0,0 +1,49 @@
+package wasmhttp
+
+import (
+	"io/ioutil"
+	"net/http/httptest"
+	"syscall/js"
+)
+
+// ResponseRecorder extends httptest.ResponseRecorder and implements js.Wrapper
+type ResponseRecorder struct {
+	*httptest.ResponseRecorder
+}
+
+// NewResponseRecorder returns a new ResponseRecorder
+func NewResponseRecorder() ResponseRecorder {
+	return ResponseRecorder{httptest.NewRecorder()}
+}
+
+var _ js.Wrapper = ResponseRecorder{}
+
+// JSValue builds and returns the equivalent JS Response (implementing js.Wrapper)
+func (rr ResponseRecorder) JSValue() js.Value {
+	var res = rr.Result()
+	var init = make(map[string]interface{})
+
+	if res.StatusCode != 0 {
+		init["status"] = res.StatusCode
+	}
+
+	if len(res.Header) != 0 {
+		var headers = make(map[string]interface{}, len(res.Header))
+		for k := range res.Header {
+			headers[k] = res.Header.Get(k)
+		}
+		init["headers"] = headers
+	}
+
+	var body js.Value = js.Undefined()
+	if res.ContentLength != 0 {
+		body = js.Global().Get("Uint8Array").New(res.ContentLength)
+		var b, err = ioutil.ReadAll(res.Body)
+		if err != nil {
+			panic(err)
+		}
+		js.CopyBytesToJS(body, b)
+	}
+
+	return js.Global().Get("Response").New(body, init)
+}
diff --git a/response_writer.go b/response_writer.go
deleted file mode 100644
index c776c9c..0000000
--- a/response_writer.go
+++ /dev/null
@@ -1,64 +0,0 @@
-package wasmhttp
-
-import (
-	"bytes"
-	"net/http"
-	"syscall/js"
-)
-
-// ResponseWriter implements http.ResponseWriter
-type ResponseWriter struct {
-	header     http.Header
-	buf        *bytes.Buffer
-	statusCode int
-}
-
-// NewResponseWriter creates a new ResponseWriter
-func NewResponseWriter() ResponseWriter {
-	return ResponseWriter{
-		header:     http.Header{},
-		buf:        bytes.NewBuffer(nil),
-		statusCode: 0,
-	}
-}
-
-var _ http.ResponseWriter = ResponseWriter{}
-
-// Header implements http.ResponseWriter.Header
-func (rw ResponseWriter) Header() http.Header {
-	return rw.header
-}
-
-// Write implements http.ResponseWriter.Write
-func (rw ResponseWriter) Write(p []byte) (int, error) {
-	return rw.buf.Write(p)
-}
-
-// WriteHeader implements http.ResponseWriter.WriteHeader
-func (rw ResponseWriter) WriteHeader(statusCode int) {
-	rw.statusCode = statusCode
-}
-
-var _ js.Wrapper = ResponseWriter{}
-
-// JSValue builds and returns the equivalent JS Response (implementing js.Wrapper)
-func (rw ResponseWriter) JSValue() js.Value {
-	init := js.Global().Get("Object").New()
-
-	if rw.statusCode != 0 {
-		init.Set("status", rw.statusCode)
-	}
-
-	if len(rw.header) != 0 {
-		headers := make(map[string]interface{}, len(rw.header))
-		for k := range rw.header {
-			headers[k] = rw.header.Get(k)
-		}
-		init.Set("headers", headers)
-	}
-
-	jsBody := js.Global().Get("Uint8Array").New(rw.buf.Len())
-	js.CopyBytesToJS(jsBody, rw.buf.Bytes())
-
-	return js.Global().Get("Response").New(jsBody, init)
-}
diff --git a/serve.go b/serve.go
index beb8c8c..87e072a 100644
--- a/serve.go
+++ b/serve.go
@@ -43,7 +43,7 @@ func Serve(handler http.Handler) func() {
 					panic(err)
 				}
 
-				var res = NewResponseWriter()
+				var res = NewResponseRecorder()
 
 				h.ServeHTTP(res, req)