diff --git a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
index 878c7c7..1f8bba6 100644
--- a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
+++ b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
@@ -145,7 +145,7 @@ protected function assertTitle($expected_title) {
    * @param int $index
    *   Link position counting from zero.
    */
-  public function assertLink($label, $index = 0) {
+  protected function assertLink($label, $index = 0) {
     return $this->assertSession()->linkExists($label, $index);
   }