diff -u b/core/modules/node/src/Plugin/Search/NodeSearch.php b/core/modules/node/src/Plugin/Search/NodeSearch.php
--- b/core/modules/node/src/Plugin/Search/NodeSearch.php
+++ b/core/modules/node/src/Plugin/Search/NodeSearch.php
@@ -574,7 +574,7 @@
       $form['content_ranking']['rankings'][$var]['value'] = array(
         '#type' => 'select',
         '#options' => $options,
-        '#attributes' => ['aria-label' => $this->t('Influence of @title', ['@title' => $values['title']])],
+        '#attributes' => ['aria-label' => $this->t('Influence of \'@title\'', ['@title' => $values['title']])],
         '#default_value' => isset($this->configuration['rankings'][$var]) ? $this->configuration['rankings'][$var] : 0,
       );
     }