diff --git a/echo.go b/echo.go
index cfd96ea1..86077358 100644
--- a/echo.go
+++ b/echo.go
@@ -657,7 +657,7 @@ func NewHTTPError(code int, message ...interface{}) *HTTPError {
 
 // Error makes it compatible with `error` interface.
 func (he *HTTPError) Error() string {
-	return fmt.Sprintf("code=%d, message=%s", he.Code, he.Message)
+	return fmt.Sprintf("code=%d, message=%v", he.Code, he.Message)
 }
 
 // WrapHandler wraps `http.Handler` into `echo.HandlerFunc`.
diff --git a/echo_test.go b/echo_test.go
index f9e56e8c..af986561 100644
--- a/echo_test.go
+++ b/echo_test.go
@@ -278,7 +278,7 @@ func TestEchoURL(t *testing.T) {
 
 func TestEchoRoutes(t *testing.T) {
 	e := New()
-	routes := []Route{
+	routes := []*Route{
 		{GET, "/users/:user/events", ""},
 		{GET, "/users/:user/events/public", ""},
 		{POST, "/repos/:owner/:repo/git/refs", ""},
@@ -290,16 +290,18 @@ func TestEchoRoutes(t *testing.T) {
 		})
 	}
 
-	for _, r := range e.Routes() {
-		found := false
-		for _, rr := range routes {
-			if r.Method == rr.Method && r.Path == rr.Path {
-				found = true
-				break
+	if assert.Equal(t, len(routes), len(e.Routes())) {
+		for _, r := range e.Routes() {
+			found := false
+			for _, rr := range routes {
+				if r.Method == rr.Method && r.Path == rr.Path {
+					found = true
+					break
+				}
+			}
+			if !found {
+				t.Errorf("Route %s %s not found", r.Method, r.Path)
 			}
-		}
-		if !found {
-			t.Errorf("Route %s : %s not found", r.Method, r.Path)
 		}
 	}
 }
@@ -423,9 +425,7 @@ func testMethod(t *testing.T, method, path string, e *Echo) {
 	i := interface{}(e)
 	reflect.ValueOf(i).MethodByName(method).Call([]reflect.Value{p, h})
 	_, body := request(method, path, e)
-	if body != method {
-		t.Errorf("expected body `%s`, got %s", method, body)
-	}
+	assert.Equal(t, method, body)
 }
 
 func request(method, path string, e *Echo) (int, string) {
@@ -434,3 +434,10 @@ func request(method, path string, e *Echo) (int, string) {
 	e.ServeHTTP(rec, req)
 	return rec.Code, rec.Body.String()
 }
+
+func TestHTTPError(t *testing.T) {
+	err := NewHTTPError(400, map[string]interface{}{
+		"code": 12,
+	})
+	assert.Equal(t, "code=400, message=map[code:12]", err.Error())
+}
diff --git a/router_test.go b/router_test.go
index 1af1ee5c..3a8b2596 100644
--- a/router_test.go
+++ b/router_test.go
@@ -10,7 +10,7 @@ import (
 )
 
 var (
-	staticRoutes = []Route{
+	staticRoutes = []*Route{
 		{"GET", "/", ""},
 		{"GET", "/cmd.html", ""},
 		{"GET", "/code.html", ""},
@@ -170,7 +170,7 @@ var (
 		{"GET", "/progs/update.bash", ""},
 	}
 
-	gitHubAPI = []Route{
+	gitHubAPI = []*Route{
 		// OAuth Authorizations
 		{"GET", "/authorizations", ""},
 		{"GET", "/authorizations/:id", ""},
@@ -433,7 +433,7 @@ var (
 		{"DELETE", "/user/keys/:id", ""},
 	}
 
-	parseAPI = []Route{
+	parseAPI = []*Route{
 		// Objects
 		{"POST", "/1/classes/:className", ""},
 		{"GET", "/1/classes/:className/:objectId", ""},
@@ -477,7 +477,7 @@ var (
 		{"POST", "/1/functions", ""},
 	}
 
-	googlePlusAPI = []Route{
+	googlePlusAPI = []*Route{
 		// People
 		{"GET", "/people/:userId", ""},
 		{"GET", "/people", ""},
@@ -839,7 +839,7 @@ func TestRouterStaticDynamicConflict(t *testing.T) {
 	assert.Equal(t, 3, c.Get("c"))
 }
 
-func testRouterAPI(t *testing.T, api []Route) {
+func testRouterAPI(t *testing.T, api []*Route) {
 	e := New()
 	r := e.router
 
@@ -866,7 +866,7 @@ func TestRouterGitHubAPI(t *testing.T) {
 
 // Issue #729
 func TestRouterParamAlias(t *testing.T) {
-	api := []Route{
+	api := []*Route{
 		{GET, "/users/:userID/following", ""},
 		{GET, "/users/:userID/followedBy", ""},
 		{GET, "/users/:userID/follow", ""},
@@ -874,7 +874,7 @@ func TestRouterParamAlias(t *testing.T) {
 	testRouterAPI(t, api)
 }
 
-func benchmarkRouterRoutes(b *testing.B, routes []Route) {
+func benchmarkRouterRoutes(b *testing.B, routes []*Route) {
 	e := New()
 	r := e.router
 	b.ReportAllocs()