diff --git a/core/lib/Drupal/Core/Config/ConfigImporter.php b/core/lib/Drupal/Core/Config/ConfigImporter.php
index 2ccbf94..6f1998f 100644
--- a/core/lib/Drupal/Core/Config/ConfigImporter.php
+++ b/core/lib/Drupal/Core/Config/ConfigImporter.php
@@ -370,16 +370,33 @@ protected function createExtensionChangelist() {
       return $module_data[$module]->sort;
     }, $module_list);
 
-    // Work out what modules to install and uninstall.
+    // Determine which modules to uninstall.
     $uninstall = array_diff(array_keys($current_extensions['module']), array_keys($new_extensions['module']));
-    $install = array_diff(array_keys($new_extensions['module']), array_keys($current_extensions['module']));
-    // Sort the module list by their weights. So that dependencies
-    // are uninstalled last.
-    asort($module_list);
+    // Sort the list of newly uninstalled extensions by their weights, so that
+    // dependencies are uninstalled last. Extensions of the same weight are
+    // sorted in reverse alphabetical order, to ensure the order is exactly
+    // opposite from installation. For example, this module list:
+    // array(
+    //   'actions' => 0,
+    //   'ban' => 0,
+    //   'options' => -2,
+    //   'text' => -1,
+    // );
+    // will result in the following sort order:
+    // -2   options
+    // -1   text
+    //  0 0 ban
+    //  0 1 actions
+    // @todo Move this sorting functionality to the extension system.
+    array_multisort(array_values($module_list), SORT_ASC, array_keys($module_list), SORT_DESC, $module_list);
     $uninstall = array_intersect(array_keys($module_list), $uninstall);
-    // Sort the module list by their weights (reverse). So that dependencies
-    // are installed first.
-    arsort($module_list);
+
+    // Determine which modules to install.
+    $install = array_diff(array_keys($new_extensions['module']), array_keys($current_extensions['module']));
+    // Ensure that installed modules are sorted in exactly the reverse order
+    // (with dependencies installed first, and modules of the same weight sorted
+    // in alphabetical order).
+    $module_list = array_reverse($module_list);
     $install = array_intersect(array_keys($module_list), $install);
 
     // Work out what themes to enable and to disable.
diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigImportUITest.php b/core/modules/config/lib/Drupal/config/Tests/ConfigImportUITest.php
index 53954c7..92b7656 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigImportUITest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigImportUITest.php
@@ -152,8 +152,8 @@ function testImport() {
     // Ensure installations and uninstallation occur as expected.
     $installed = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_installed', array());
     $uninstalled = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_uninstalled', array());
-    $expected = array('ban', 'action', 'text', 'options');
-    $this->assertIdentical($expected, $installed, 'Ban, Action, Text and Options modules installed in the correct order.');
+    $expected = array('action', 'ban', 'text', 'options');
+    $this->assertIdentical($expected, $installed, 'Action, Ban, Text and Options modules installed in the correct order.');
     $this->assertTrue(empty($uninstalled), 'No modules uninstalled during import');
 
     // Verify that the action.settings configuration object was only written
@@ -207,7 +207,7 @@ function testImport() {
     $installed = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_installed', array());
     $uninstalled = \Drupal::state()->get('ConfigImportUITest.core.extension.modules_uninstalled', array());
     $expected = array('options', 'text', 'ban', 'action');
-    $this->assertIdentical($expected, $uninstalled, 'Options, Text, Action and Ban modules uninstalled in the correct order.');
+    $this->assertIdentical($expected, $uninstalled, 'Options, Text, Ban and Action modules uninstalled in the correct order.');
     $this->assertTrue(empty($installed), 'No modules installed during import');
 
     $theme_info = \Drupal::service('theme_handler')->listInfo();