diff --git a/test/tests/unit/Routing/Route/RouteTest.php b/test/tests/unit/Routing/Route/RouteTest.php
index e37f6d9..e226a37 100644
--- a/test/tests/unit/Routing/Route/RouteTest.php
+++ b/test/tests/unit/Routing/Route/RouteTest.php
@@ -13,7 +13,7 @@ class RouteTest extends TestCase
 {
     use ProphecyTrait;
 
-    const TARGET = '/target';
+    private const TARGET = '/target';
 
     private $methodMap;
     private $route;