diff --git a/core/tests/Drupal/Tests/BrowserTestBase.php b/core/tests/Drupal/Tests/BrowserTestBase.php
index 087419054ab1a8fa2b3fc5dc33fbbdcedb3f74c8..25756bf36d758bb623f720d54dc7cda7a7ec02d9 100644
--- a/core/tests/Drupal/Tests/BrowserTestBase.php
+++ b/core/tests/Drupal/Tests/BrowserTestBase.php
@@ -1177,6 +1177,7 @@ protected function cssSelect($selector) {
   protected function clickLink($label, $index = 0) {
     $label = (string) $label;
     $links = $this->getSession()->getPage()->findAll('named', ['link', $label]);
+    $this->assertArrayHasKey($index, $links, 'The link ' . $label . ' was not found on the page.');
     $links[$index]->click();
   }