diff --git a/core/modules/simpletest/tests/registry_test.info b/core/modules/simpletest/tests/registry_test.info
new file mode 100644
index 0000000..147d33d
--- /dev/null
+++ b/core/modules/simpletest/tests/registry_test.info
@@ -0,0 +1,6 @@
+name = Registry test
+description = Support module for registry testing.
+package = Testing
+version = VERSION
+core = 8.x
+hidden = TRUE
diff --git a/core/modules/simpletest/tests/registry_test.module b/core/modules/simpletest/tests/registry_test.module
new file mode 100644
index 0000000..0e94ab9
--- /dev/null
+++ b/core/modules/simpletest/tests/registry_test.module
@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * Implements hook_registry_files_alter().
+ */
+function registry_test_registry_files_alter(&$files, $modules) {
+  $file = variable_get('registry_test_class_file', FALSE);
+  $wrapper_class = file_stream_wrapper_get_class(file_uri_scheme($file->uri));
+  $stream_wrapper = new $wrapper_class;
+  $directory = $stream_wrapper->getDirectoryPath();
+  $target = file_uri_target($file->uri);
+  $files["$directory/$target"] = array('module' => 'registry_test', 'weight' => 0);
+}
+
+/**
+ * Implements hook_menu().
+ */
+function registry_test_menu() {
+  $items['registry-test/load-resource'] = array(
+    'title' => 'Load a resource',
+    'page callback' => 'registry_test_load_resource',
+    'access callback' => TRUE,
+    'type' => MENU_CALLBACK,
+  );
+  return $items;
+}
+
+/**
+ * Menu callback: load a class and print it out.
+ */
+function registry_test_load_resource() {
+  return array(
+    '#markup' => '<pre>' . print_r(new RegistryTestClass(), TRUE) . '</pre>',
+  );
+}
+
diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index 9780ed2..b2e108a 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -3093,6 +3093,7 @@ function _registry_check_code($type, $name = NULL) {
  * each interface or class in the database.
  */
 function registry_rebuild() {
+  drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
   system_rebuild_module_data();
   registry_update();
 }
diff --git a/core/modules/simpletest/tests/registry.test b/core/modules/simpletest/tests/registry.test
index bcd8d4e..a832bdc 100644
--- a/core/modules/simpletest/tests/registry.test
+++ b/core/modules/simpletest/tests/registry.test
@@ -140,3 +140,49 @@ CONTENTS;
   }
 
 }
+
+class RegistryMovedResourceTestCase extends DrupalWebTestCase {
+
+  public $profile = 'testing';
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Registry move resources test',
+      'description' => "Change where a test module's class lives, and test we can recover.",
+      'group' => 'System'
+    );
+  }
+
+  protected function moveRegistryResource() {
+    file_delete(variable_get('registry_test_class_file'));
+    variable_set('registry_test_class_file', $this->writeOutClassFile());
+  }
+
+  protected function writeOutClassFile() {
+    $chrs = hash('sha256', microtime() . mt_rand());
+    $file_contents = <<<CONTENTS
+<?php
+class RegistryTestClass {}
+
+CONTENTS;
+    return file_save_data($file_contents, 'public://registry_test_' . substr($chrs, 0, 16));
+  }
+
+  public function setUp() {
+    parent::setUp();
+    variable_set('registry_test_class_file', $this->writeOutClassFile());
+    module_enable(array('registry_test'));
+    menu_rebuild();
+  }
+
+  public function testRegistryMovedResource() {
+    $this->admin_user = $this->drupalCreateUser(array('administer software updates', 'administer site configuration'));
+    $this->drupalLogin($this->admin_user);
+
+    $this->drupalGet('registry-test/load-resource');
+    $this->moveRegistryResource();
+    $this->drupalGet($this->getAbsoluteUrl('core/update.php'));
+    $this->drupalGet('registry-test/load-resource');
+  }
+}
+
diff --git a/core/update.php b/core/update.php
index ac3b255..ac1553f 100644
--- a/core/update.php
+++ b/core/update.php
@@ -379,6 +379,8 @@ if (empty($op) && update_access_allowed()) {
   // in updated code are picked up.
   module_implements_reset();
 
+  registry_rebuild();
+
   // Set up $language, since the installer components require it.
   drupal_language_initialize();