reverted:
--- b/core/modules/system/src/Tests/Installer/TestingConfigOverridesInstallerTest.php
+++ /dev/null
@@ -1,29 +0,0 @@
-<?php
-
-namespace Drupal\system\Tests\Installer;
-
-use Drupal\simpletest\InstallerTestBase;
-
-/**
- * Tests the interactive installer installing the testing override profile.
- *
- * @group Installer
- */
-class TestingConfigOverridesInstallerTest extends InstallerTestBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  protected $profile = 'testing_config_overrides';
-
-  /**
-   * Ensures that the exported configuration is up to date.
-   */
-  public function testProfileOverrides() {
-    /** @var \Drupal\Core\Config\ConfigFactoryInterface $config_factory */
-    $config_factory = $this->container->get('config.factory');
-    $test_overrides = $config_factory->get('testing_config_overrides_a.dependencies_test')->get('test_overrides');
-    $this->assertEqual($test_overrides, 'testing_config_overrides_profile');
-  }
-
-}
diff -u b/core/modules/system/tests/modules/testing_config_overrides_a/config/schema/testing_config_overrides_a.schema.yml b/core/modules/system/tests/modules/testing_config_overrides_a/config/schema/testing_config_overrides_a.schema.yml
--- b/core/modules/system/tests/modules/testing_config_overrides_a/config/schema/testing_config_overrides_a.schema.yml
+++ b/core/modules/system/tests/modules/testing_config_overrides_a/config/schema/testing_config_overrides_a.schema.yml
@@ -1,5 +1,5 @@
 testing_config_overrides_a.dependencies_test:
-  type: config_object
+  type: config_entity
   label: 'Test profile installation overrides'
   mapping:
     test_overrides: