diff --git c/core/modules/search/lib/Drupal/search/Controller/SearchController.php w/core/modules/search/lib/Drupal/search/Controller/SearchController.php
index 88cb96b..8622341 100644
--- c/core/modules/search/lib/Drupal/search/Controller/SearchController.php
+++ w/core/modules/search/lib/Drupal/search/Controller/SearchController.php
@@ -15,9 +15,9 @@ class SearchController {
   /**
    * @todo Remove search_view().
    */
-  public function searchView($plugin_id) {
+  public function searchView($keys) {
     module_load_include('pages.inc', 'search');
-    return search_view($plugin_id);
+    return search_view(NULL, $keys);
   }
 
   /**
diff --git c/core/modules/search/lib/Drupal/search/Routing/SearchRouteSubscriber.php w/core/modules/search/lib/Drupal/search/Routing/SearchRouteSubscriber.php
index 51a8219..02bfd03 100644
--- c/core/modules/search/lib/Drupal/search/Routing/SearchRouteSubscriber.php
+++ w/core/modules/search/lib/Drupal/search/Routing/SearchRouteSubscriber.php
@@ -60,6 +60,7 @@ public function routes(RouteBuildEvent $event) {
         'keys' => '',
       );
       $requirements = array(
+        'keys' => '.+',
         '_search_plugin_view_access' => $plugin_id,
         '_permission' => 'search content',
       );
diff --git c/core/modules/search/search.routing.yml w/core/modules/search/search.routing.yml
index 4187c4d..c3ae044 100644
--- c/core/modules/search/search.routing.yml
+++ w/core/modules/search/search.routing.yml
@@ -13,12 +13,14 @@ search.reindex_confirm:
     _permission: 'administer search'
 
 search.view:
-  path: '/search/{plugin_id}'
+  path: '/search/{plugin_id}/{keys}'
   defaults:
-    _content: '\Drupal\search\Controller\SearchController::searchView'
+    _content: '\Drupal\search\Controller\SearchController::searchViewPlugin'
     plugin_id: NULL
+    keys: ''
   options:
     _access_mode: 'ALL'
   requirements:
+    keys: '.+'
     _permission: 'search content'
     _search_access: 'TRUE'