diff --git a/tests/AppTest.php b/tests/AppTest.php
index da47675..ff03634 100644
--- a/tests/AppTest.php
+++ b/tests/AppTest.php
@@ -185,7 +185,7 @@ public function testDispatcherShouldBeCallable()
 
     public function testWithInternalContainerFactory()
     {
-        chdir(dirname(__DIR__.'/../'));
+        chdir(__DIR__.'/app');
         $app = new App();
 
         $request = (new Request())
diff --git a/tests/app/config/first.php b/tests/app/config/first.php
index c33737b..712eb86 100644
--- a/tests/app/config/first.php
+++ b/tests/app/config/first.php
@@ -1,6 +1,9 @@
 <?php
 
 return [
+    'router' => \FastRoute\simpleDispatcher(function (\FastRoute\RouteCollector $r) {
+        $r->addRoute('GET', '/', ['TestApp\Controller\Index', 'index']);
+    }),
     'one' => 1,
     'two' => [
         'class' => new \StdClass(),
diff --git a/tests/config/app.test.config.php b/tests/config/app.test.config.php
deleted file mode 100644
index 3c568e2..0000000
--- a/tests/config/app.test.config.php
+++ /dev/null
@@ -1,7 +0,0 @@
-<?php
-
-return [
-    'router' => \FastRoute\simpleDispatcher(function (FastRoute\RouteCollector $r) {
-        $r->addRoute('GET', '/', ['TestApp\Controller\Index', 'index']);
-    })
-];