diff --git a/core/modules/block/tests/src/Kernel/BlockMachineNameTest.php b/core/modules/block/tests/src/Kernel/BlockMachineNameTest.php
index 7522724..dd55d25 100644
--- a/core/modules/block/tests/src/Kernel/BlockMachineNameTest.php
+++ b/core/modules/block/tests/src/Kernel/BlockMachineNameTest.php
@@ -5,6 +5,7 @@
 
 use Drupal\block_content\Entity\BlockContent;
 use Drupal\block_content\Entity\BlockContentType;
+use Drupal\block_content\Plugin\Block\BlockContentBlock;
 use Drupal\Component\Plugin\PluginBase;
 use Drupal\Component\Utility\Unicode;
 use Drupal\Core\Language\LanguageInterface;
@@ -22,14 +23,16 @@ class BlockMachineNameTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = ['block', 'block_content', 'system'];
+  public static $modules = ['block', 'block_content', 'system', 'user'];
 
   /**
    * {@inheritdoc}
    */
   public function setUp() {
     parent::setUp();
+    $this->installSchema('system', ['sequence']);
     $this->installEntitySchema('block_content');
+    $this->installEntitySchema('user');
   }
 
   /**
@@ -50,22 +53,21 @@ public function testMachineNamesShouldNotCollideIfBlockTitlesContainPeriod() {
     ]);
     $block_content->save();
 
-    // Generate an ID like
-    // \Drupal\Core\Block\BlockBase::getMachineNameSuggestion does.
-    $id = $this->container->get('transliteration')->transliterate($block_content->label(), LanguageInterface::LANGCODE_DEFAULT, '_');
-    $id = Unicode::strtolower($id);
-    $id = preg_replace('@[^a-z0-9_.]+@', '', $id);
+    // Use \Drupal\Core\Block\BlockBase::getMachineNameSuggestion to generate
+    // an ID.
+    $plugin_id = 'block_content' . PluginBase::DERIVATIVE_SEPARATOR . $block_content->uuid();
+    $block_plugin = $this->container->get('plugin.manager.block')->createInstance($plugin_id, []);
+    $method = new \ReflectionMethod($block_plugin, 'getMachineNameSuggestion');
+    $method->setAccessible(TRUE);
+    $id = $method->invoke($block_plugin);
 
     // Now place the block content entity.
-    $plugin_id = 'block_content' . PluginBase::DERIVATIVE_SEPARATOR . $block_content->uuid();
     $block = $this->placeBlock($plugin_id, [
       'label' => 'This. is whizzy',
       'id' => $id,
     ]);
 
     $theme = $this->container->get('config.factory')->get('system.theme')->get('default');
-    /** @var \Drupal\Core\Entity\EntityFormBuilderInterface $form_builder */
-    $form_builder = $this->container->get('entity.form_builder');
 
     // Create a new entity.
     /** @var \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager */