diff --git a/core/modules/block/lib/Drupal/block/Tests/BlockNodeAccessCacheTest.php b/core/modules/block/lib/Drupal/block/Tests/BlockNodeAccessCacheTest.php
index a9bd24d..184c529 100644
--- a/core/modules/block/lib/Drupal/block/Tests/BlockNodeAccessCacheTest.php
+++ b/core/modules/block/lib/Drupal/block/Tests/BlockNodeAccessCacheTest.php
@@ -99,7 +99,7 @@ function testNodeGrantsBypass() {
    * Private helper method to set the test block's cache mode.
    */
   private function setCacheMode($cache_mode) {
-    $this->block->getPlugin()->setConfig('cache', $cache_mode);
+    $this->block->getPlugin()->setConfigurationValue('cache', $cache_mode);
     $this->block->save();
   }