diff --git a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
index d63ada6..0789fc8 100644
--- a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
+++ b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
@@ -240,7 +240,7 @@ protected function assertUrl($path) {
    * @deprecated Scheduled for removal in Drupal 9.0.0.
    *   Use $this->assertSession()->assertNoEscaped() instead.
    */
-  public function assertNoEscaped($raw) {
+  protected function assertNoEscaped($raw) {
     $this->assertSession()->assertNoEscaped($raw);
   }