diff --git a/src/Routing/Route/RouteFactory.php b/src/Routing/Route/RouteFactory.php
index d0beb03..1a167fc 100644
--- a/src/Routing/Route/RouteFactory.php
+++ b/src/Routing/Route/RouteFactory.php
@@ -7,7 +7,7 @@ use WellRESTed\Dispatching\DispatcherInterface;
 /**
  * @internal
  */
-class RouteFactory implements RouteFactoryInterface
+class RouteFactory
 {
     private $dispatcher;
 
@@ -27,7 +27,7 @@ class RouteFactory implements RouteFactoryInterface
      * @param string $target Route target or target pattern
      * @return Route
      */
-    public function create($target)
+    public function create(string $target): Route
     {
         if ($target[0] === '/') {
 
diff --git a/src/Routing/Route/RouteFactoryInterface.php b/src/Routing/Route/RouteFactoryInterface.php
deleted file mode 100644
index 65bd41e..0000000
--- a/src/Routing/Route/RouteFactoryInterface.php
+++ /dev/null
@@ -1,22 +0,0 @@
-<?php
-
-namespace WellRESTed\Routing\Route;
-
-/**
- * @internal
- */
-interface RouteFactoryInterface
-{
-    /**
-     * Creates a route for the given target.
-     *
-     * - Targets with no special characters will create StaticRoutes
-     * - Targets ending with * will create PrefixRoutes
-     * - Targets containing URI variables (e.g., {id}) will create TemplateRoutes
-     * - Regular expressions will create RegexRoutes
-     *
-     * @param string $target Route target or target pattern
-     * @return Route
-     */
-    public function create($target);
-}
diff --git a/src/Routing/Router.php b/src/Routing/Router.php
index 311279c..9656b94 100644
--- a/src/Routing/Router.php
+++ b/src/Routing/Router.php
@@ -8,7 +8,6 @@ use WellRESTed\Dispatching\Dispatcher;
 use WellRESTed\Dispatching\DispatcherInterface;
 use WellRESTed\Routing\Route\Route;
 use WellRESTed\Routing\Route\RouteFactory;
-use WellRESTed\Routing\Route\RouteFactoryInterface;
 
 class Router
 {
@@ -16,7 +15,7 @@ class Router
     private $pathVariablesAttributeName;
     /** @var DispatcherInterface */
     private $dispatcher;
-    /** @var RouteFactoryInterface */
+    /** @var RouteFactory */
     private $factory;
     /** @var Route[] Array of Route objects */
     private $routes;
@@ -202,7 +201,7 @@ class Router
         return new Dispatcher();
     }
 
-    protected function getRouteFactory(DispatcherInterface $dispatcher): RouteFactoryInterface
+    protected function getRouteFactory(DispatcherInterface $dispatcher): RouteFactory
     {
         return new RouteFactory($dispatcher);
     }
diff --git a/test/tests/unit/Routing/Route/RouteFactoryTest.php b/test/tests/unit/Routing/Route/RouteFactoryTest.php
index d818589..dd8f6cd 100644
--- a/test/tests/unit/Routing/Route/RouteFactoryTest.php
+++ b/test/tests/unit/Routing/Route/RouteFactoryTest.php
@@ -17,28 +17,28 @@ class RouteFactoryTest extends TestCase
         $this->dispatcher = $this->prophesize(DispatcherInterface::class);
     }
 
-    public function testCreatesStaticRoute()
+    public function testCreatesStaticRoute(): void
     {
         $factory = new RouteFactory($this->dispatcher->reveal());
         $route = $factory->create('/cats/');
         $this->assertSame(Route::TYPE_STATIC, $route->getType());
     }
 
-    public function testCreatesPrefixRoute()
+    public function testCreatesPrefixRoute(): void
     {
         $factory = new RouteFactory($this->dispatcher->reveal());
         $route = $factory->create('/cats/*');
         $this->assertSame(Route::TYPE_PREFIX, $route->getType());
     }
 
-    public function testCreatesRegexRoute()
+    public function testCreatesRegexRoute(): void
     {
         $factory = new RouteFactory($this->dispatcher->reveal());
         $route = $factory->create('~/cat/[0-9]+~');
         $this->assertSame(Route::TYPE_PATTERN, $route->getType());
     }
 
-    public function testCreatesTemplateRoute()
+    public function testCreatesTemplateRoute(): void
     {
         $factory = new RouteFactory($this->dispatcher->reveal());
         $route = $factory->create('/cat/{id}');
diff --git a/test/tests/unit/Routing/RouterTest.php b/test/tests/unit/Routing/RouterTest.php
index 012e4c0..8548db6 100644
--- a/test/tests/unit/Routing/RouterTest.php
+++ b/test/tests/unit/Routing/RouterTest.php
@@ -10,7 +10,6 @@ use WellRESTed\Message\Response;
 use WellRESTed\Message\ServerRequest;
 use WellRESTed\Routing\Route\Route;
 use WellRESTed\Routing\Route\RouteFactory;
-use WellRESTed\Routing\Route\RouteFactoryInterface;
 use WellRESTed\Test\Doubles\NextMock;
 use WellRESTed\Test\TestCase;
 
@@ -449,7 +448,7 @@ class RouterWithFactory extends Router
 {
     public static $routeFactory;
 
-    protected function getRouteFactory(DispatcherInterface $dispatcher): RouteFactoryInterface
+    protected function getRouteFactory(DispatcherInterface $dispatcher): RouteFactory
     {
         return self::$routeFactory;
     }