--- /dev/null
+<?php
+
+/**
+ * @file
+ * Contains database additions to drupal-8.bare.standard.php.gz for testing the
+ * upgrade path of hal_update_8301().
+ */
+
+use Drupal\Core\Database\Database;
+
+$connection = Database::getConnection();
+
+// Set the schema version.
+$connection->insert('key_value')
+ ->fields([
+ 'collection' => 'system.schema',
+ 'name' => 'hal',
+ 'value' => 'i:8000;',
+ ])
+ ->fields([
+ 'collection' => 'system.schema',
+ 'name' => 'serialization',
+ 'value' => 'i:8000;',
+ ])
+ ->execute();
+
+// Update core.extension.
+$extensions = $connection->select('config')
+ ->fields('config', ['data'])
+ ->condition('collection', '')
+ ->condition('name', 'core.extension')
+ ->execute()
+ ->fetchField();
+$extensions = unserialize($extensions);
+$extensions['module']['hal'] = 0;
+$extensions['module']['serialization'] = 0;
+$connection->update('config')
+ ->fields([
+ 'data' => serialize($extensions),
+ ])
+ ->condition('collection', '')
+ ->condition('name', 'core.extension')
+ ->execute();