only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/system/src/Tests/Entity/Update/LangcodeToAsciiUpdateFilledTest.php
@@ -0,0 +1,26 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Tests\Entity\Update\LangcodeToAsciiUpdateFilledTest.
+ */
+
+namespace Drupal\system\Tests\Entity\Update;
+
+/**
+ * Runs LangcodeToAsciiUpdateTest with a dump filled with content.
+ *
+ * @group Entity
+ */
+class LangcodeToAsciiUpdateFilledTest extends LangcodeToAsciiUpdateTest {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setDatabaseDumpFiles() {
+    $this->databaseDumpFiles = [
+      __DIR__ . '/../../../../tests/fixtures/update/drupal-8.bare.filled.php.gz',
+    ];
+  }
+
+}