diff --git a/proxy/http_test.go b/proxy/http_test.go
index 1d67a10e0..9fd1f3cfc 100644
--- a/proxy/http_test.go
+++ b/proxy/http_test.go
@@ -240,7 +240,7 @@ func TestNewHTTPProxy_badStatusCode_detailed(t *testing.T) {
 		t.Errorf("unexpected error code: %d", response.Metadata.StatusCode)
 	}
 	b, _ := json.Marshal(response.Data)
-	if string(b) != `{"error_some":{"http_status_code":500,"http_body":"booom\n"}}` {
+	if string(b) != `{"error_some":{"http_status_code":500,"http_body":"booom\n","http_body_encoding":"text/plain; charset=utf-8"}}` {
 		t.Errorf("unexpected response content: %s", string(b))
 	}
 	select {
diff --git a/router/mux/router_test.go b/router/mux/router_test.go
index 955084212..f7f0b58a8 100644
--- a/router/mux/router_test.go
+++ b/router/mux/router_test.go
@@ -174,14 +174,6 @@ func TestDefaultFactory_ko(t *testing.T) {
 				Method:   "GETTT",
 				Backend:  []*config.Backend{},
 			},
-			{
-				Endpoint: "/also-ignored",
-				Method:   "PUT",
-				Backend: []*config.Backend{
-					{},
-					{},
-				},
-			},
 		},
 	}
 
diff --git a/test/integration_test.go b/test/integration_test.go
index 7f5d96130..b41bc00dc 100644
--- a/test/integration_test.go
+++ b/test/integration_test.go
@@ -73,6 +73,7 @@ func TestKrakenD_ginRouter(t *testing.T) {
 			"trusted_proxies":        []interface{}{"127.0.0.1/32", "::1"},
 			"remote_ip_headers":      []interface{}{"x-forwarded-for"},
 			"forwarded_by_client_ip": true,
+			"return_error_msg":       true,
 		}
 
 		ignoredChan := make(chan string)
@@ -238,7 +239,7 @@ func testKrakenD(t *testing.T, runRouter func(logging.Logger, *config.ServiceCon
 			url:        "/detail_error",
 			headers:    map[string]string{},
 			expHeaders: incompleteHeader,
-			expBody:    `{"email":"some@email.com","error_backend_a":{"http_status_code":429,"http_body":"sad panda\n"},"name":"a"}`,
+			expBody:    `{"email":"some@email.com","error_backend_a":{"http_status_code":429,"http_body":"sad panda\n","http_body_encoding":"text/plain; charset=utf-8"},"name":"a"}`,
 		},
 		{
 			name:       "querystring-params-no-params",
@@ -454,7 +455,6 @@ func testKrakenD(t *testing.T, runRouter func(logging.Logger, *config.ServiceCon
 			}
 		})
 	}
-
 }
 
 func setupBackend(t *testing.T) (*config.ServiceConfig, error) {
diff --git a/test/lura.json b/test/lura.json
index 6ee7da48f..ee74c76a1 100644
--- a/test/lura.json
+++ b/test/lura.json
@@ -8,6 +8,9 @@
     "extra_config":{
         "github_com/luraproject/lura/router/gin":{
             "return_error_msg":true
+        },
+        "github_com/luraproject/lura/router/mux":{
+            "return_error_msg":true
         }
     },
     "endpoints": [
diff --git a/transport/http/client/status.go b/transport/http/client/status.go
index 25d846162..893a77dc8 100644
--- a/transport/http/client/status.go
+++ b/transport/http/client/status.go
@@ -87,6 +87,7 @@ func newHTTPResponseError(resp *http.Response) HTTPResponseError {
 	return HTTPResponseError{
 		Code: resp.StatusCode,
 		Msg:  string(body),
+		Enc:  resp.Header.Get("Content-Type"),
 	}
 }
 
@@ -94,6 +95,7 @@ func newHTTPResponseError(resp *http.Response) HTTPResponseError {
 type HTTPResponseError struct {
 	Code int    `json:"http_status_code"`
 	Msg  string `json:"http_body,omitempty"`
+	Enc  string `json:"http_body_encoding,omitempty"`
 }
 
 // Error returns the error message
@@ -106,6 +108,11 @@ func (r HTTPResponseError) StatusCode() int {
 	return r.Code
 }
 
+// Encoding returns the content type returned by the backend
+func (r HTTPResponseError) Encoding() string {
+	return r.Enc
+}
+
 // NamedHTTPResponseError is the error to be returned by the DetailedHTTPStatusHandler
 type NamedHTTPResponseError struct {
 	HTTPResponseError
diff --git a/transport/http/client/status_test.go b/transport/http/client/status_test.go
index 82912f281..45b1ae898 100644
--- a/transport/http/client/status_test.go
+++ b/transport/http/client/status_test.go
@@ -5,6 +5,7 @@ package client
 import (
 	"bytes"
 	"context"
+	"fmt"
 	"io"
 	"net/http"
 	"testing"
@@ -14,6 +15,7 @@ import (
 
 func TestDetailedHTTPStatusHandler(t *testing.T) {
 	expectedErrName := "some"
+	expectedEncoding := "application/json; charset=utf-8"
 	cfg := &config.Backend{
 		ExtraConfig: config.ExtraConfig{
 			Namespace: map[string]interface{}{
@@ -47,7 +49,8 @@ func TestDetailedHTTPStatusHandler(t *testing.T) {
 
 		resp := &http.Response{
 			StatusCode: code,
-			Body:       io.NopCloser(bytes.NewBufferString(msg)),
+			Body:       io.NopCloser(bytes.NewBufferString(fmt.Sprintf(`{"msg":%q}`, msg))),
+			Header:     http.Header{"Content-Type": []string{expectedEncoding}},
 		}
 
 		r, err := sh(context.Background(), resp)
@@ -68,7 +71,7 @@ func TestDetailedHTTPStatusHandler(t *testing.T) {
 			return
 		}
 
-		if e.Error() != msg {
+		if e.Error() != fmt.Sprintf(`{"msg":%q}`, msg) {
 			t.Errorf("#%d unexpected message: %s", i, e.Msg)
 			return
 		}
@@ -77,6 +80,10 @@ func TestDetailedHTTPStatusHandler(t *testing.T) {
 			t.Errorf("#%d unexpected error name: %s", i, e.name)
 			return
 		}
+
+		if e.Encoding() != expectedEncoding {
+			t.Errorf("#%d unexpected encoding: %s", i, e.Enc)
+		}
 	}
 }