diff --git a/src/EventSubscriber/RouteNormalizerRequestSubscriber.php b/src/EventSubscriber/RouteNormalizerRequestSubscriber.php
index ea848d8..433172f 100644
--- a/src/EventSubscriber/RouteNormalizerRequestSubscriber.php
+++ b/src/EventSubscriber/RouteNormalizerRequestSubscriber.php
@@ -9,6 +9,7 @@ use Symfony\Component\HttpKernel\KernelEvents;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Cmf\Component\Routing\RouteObjectInterface;
 
 /**
  * Normalizes GET requests performing a redirect if required.
@@ -102,14 +103,20 @@ class RouteNormalizerRequestSubscriber implements EventSubscriberInterface {
    * @return bool
    */
   protected function shouldRedirect(GetResponseEvent $event) {
-    return $this->routeNormalizerEnabled
+    if ($request = $event->getRequest()) {
+      $route_match = \Drupal::service('router.no_access_checks')->matchRequest($request);
+      $route = $route_match[RouteObjectInterface::ROUTE_OBJECT];
+      return $this->routeNormalizerEnabled
       && $event->isMasterRequest()
-      && ($request = $event->getRequest())
       && ($request->isMethod('GET') || $request->isMethod('HEAD'))
       && !$request->query->has('destination')
       && RequestHelper::isCleanUrl($request)
       && !$request->attributes->get('_disable_route_normalizer')
-      && !\Drupal::config('redirect.settings')->get('ignore_admin_path');
+      && (!\Drupal::config('redirect.settings')->get('ignore_admin_path') || !\Drupal::service('router.admin_context')->isAdminRoute($route));
+    }
+    else {
+      return false;
+    }
   }
 
   /**
diff --git a/src/Tests/GlobalRedirectTest.php b/src/Tests/GlobalRedirectTest.php
index 519096b..ed8a770 100644
--- a/src/Tests/GlobalRedirectTest.php
+++ b/src/Tests/GlobalRedirectTest.php
@@ -157,8 +157,14 @@ class GlobalRedirectTest extends WebTestBase {
     $this->config->set('ignore_admin_path', FALSE)->save();
     $this->assertRedirect('admin/config/system/site-information', 'site-info');
 
+    // Test alias normalization again with ignore_admin_path false.
+    $this->assertRedirect('Test-node', 'test-node');
+
     $this->config->set('ignore_admin_path', TRUE)->save();
     $this->assertRedirect('admin/config/system/site-information', NULL, 'HTTP/1.1 200 OK');
+
+    // Test alias normalization again with ignore_admin_path true.
+    $this->assertRedirect('Test-node', 'test-node');
   }
 
   /**