diff -u b/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php b/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php
--- b/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php
@@ -53,8 +53,8 @@
    */
   public function waitOnAutocomplete() {
     // Wait for the autocomplete to be visible.
-    $condition = "(jQuery('.ui-autocomplete:visible .ui-menu-item').length > 0)";
-    return $this->session->wait($condition);
+    $condition = "(jQuery('.ui-autocomplete:visible li').length > 0)";
+    return $this->session->wait(10000, $condition);
   }
 
   /**