diff --git a/cache_test.go b/cache_test.go
index 0893892..3f29ea5 100644
--- a/cache_test.go
+++ b/cache_test.go
@@ -21,6 +21,9 @@ func ExampleCache() {
 	cache.Set([]byte("user5"), 5)
 	fmt.Println(cache.Get([]byte("user3")))
 
+	cache.Set([]byte("user5"), 6)
+	fmt.Println(cache.Get([]byte("user5")).(int))
+
 	cache2 := newCache(0)
 	cache2.Set([]byte("user1"), 1)
 	fmt.Println(cache2.Get([]byte("user1")).(int))
@@ -31,5 +34,6 @@ func ExampleCache() {
 	// <nil>
 	// 2
 	// <nil>
+	// 6
 	// 1
 }
diff --git a/router.go b/router.go
index 6b428bd..0c5c0d8 100644
--- a/router.go
+++ b/router.go
@@ -400,9 +400,9 @@ func (gb *gearbox) matchRouteAgainstRegistered(method, path []byte) (handlersCha
 	trimmedPath := trimPath(path)
 
 	// Try to get from cache if it's enabled
-	cacheKey := ""
+	cacheKey := make([]byte, 0)
 	if !gb.settings.DisableCaching {
-		cacheKey := append(method, trimmedPath...)
+		cacheKey = append(method, trimmedPath...)
 		if cacheResult, ok := gb.cache.Get(cacheKey).(*matchParamsResult); ok {
 			return cacheResult.Handlers, cacheResult.Params
 		}
diff --git a/router_test.go b/router_test.go
index db5f0c7..6a73a2f 100644
--- a/router_test.go
+++ b/router_test.go
@@ -34,6 +34,7 @@ func TestValidateRoutePath(t *testing.T) {
 		{input: []byte("/user/*"), isErr: false},
 		{input: []byte("/user/:name"), isErr: false},
 		{input: []byte("/user/:name/:name"), isErr: true},
+		{input: []byte("/user/:name?/get"), isErr: true},
 	}
 
 	for _, tt := range tests {
@@ -294,7 +295,7 @@ func TestConstructRoutingTree(t *testing.T) {
 		{method: []byte(MethodGet), path: []byte("/books/search/:pattern:([a-z]+)"), handler: emptyHandlersChain},
 		{method: []byte(MethodGet), path: []byte("/books/search/:pattern"), handler: emptyHandlersChain},
 		{method: []byte(MethodGet), path: []byte("/books/search/:pattern1/:pattern2/:pattern3"), handler: emptyHandlersChain},
-		{method: []byte(MethodGet), path: []byte("/books/search/*"), handler: emptyHandlersChain},
+		{method: []byte(MethodGet), path: []byte("/books//search/*"), handler: emptyHandlersChain},
 		{method: []byte(MethodGet), path: []byte("/account/:name?"), handler: emptyHandlersChain},
 		{method: []byte(MethodGet), path: []byte("/profile/:name:([a-z]+)?"), handler: emptyHandlersChain},
 		{method: []byte(MethodGet), path: []byte("/order/:name1/:name2:([a-z]+)?"), handler: emptyHandlersChain},