diff -u b/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php b/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php
--- b/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php
@@ -7,8 +7,10 @@
 
 namespace Drupal\config\Tests;
 
-use Drupal\Core\Config\InstallStorage;
+use Drupal\config_test\TestInstallStorage;
+use Drupal\config_test\TestSchemaStorage;
 use Drupal\Core\Config\Schema\Property;
+use Drupal\Core\Config\TypedConfigManager;
 use Drupal\Core\TypedData\Type\BooleanInterface;
 use Drupal\Core\TypedData\Type\StringInterface;
 use Drupal\simpletest\DrupalUnitTestBase;
@@ -24,6 +26,13 @@
 class DefaultConfigTest extends DrupalUnitTestBase {
 
   /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('config_test');
+
+  /**
    * The config schema wrapper object for the configuration object under test.
    *
    * @var \Drupal\Core\Config\Schema\Element
@@ -57,10 +66,18 @@
    * Tests default configuration data type.
    */
   public function testDefaultConfig() {
-    /** @var \Drupal\Core\Config\TypedConfigManager $typed_config */
-    $typed_config = $this->container->get('config.typed');
+    // Create a typed config manager with access to configuration schema in
+    // every module, profile and theme.
+    $typed_config = new TypedConfigManager(
+      \Drupal::service('config.storage'),
+      new TestSchemaStorage(),
+      \Drupal::service('cache.config')
+    );
+
+    // Create a configuration storage with access to default configuration in
+    // every module, profile and theme.
+    $default_config_storage = new TestInstallStorage();
 
-    $default_config_storage = new InstallStorage();
     foreach ($default_config_storage->listAll() as $config_name) {
       // @todo: remove once migration and
       // translation (https://drupal.org/node/2168609) schemas are in.
diff -u b/core/modules/system/config/schema/system.schema.yml b/core/modules/system/config/schema/system.schema.yml
--- b/core/modules/system/config/schema/system.schema.yml
+++ b/core/modules/system/config/schema/system.schema.yml
@@ -362,16 +362,6 @@
     allow_insecure_uploads:
       type: boolean
       label: 'Allow insecure uploads'
-    chmod:
-      type: mapping
-      label: 'Permission mode settings'
-      mapping:
-        directory:
-          type: integer
-          label: 'Directory permission mode'
-        file:
-          type: integer
-          label: 'File permission mode'
     default_scheme:
       type: string
       label: 'Default download method'
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/config/tests/config_test/lib/Drupal/config_test/TestInstallStorage.php
@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\config_test\TestInstallStorage.
+ */
+
+namespace Drupal\config_test;
+
+use Drupal\Core\Config\InstallStorage;
+
+/**
+ * A test configuration storage to read configuration from all profiles, modules
+ * and themes regardless of installation status or installed profile.
+ */
+class TestInstallStorage extends InstallStorage {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getAllFolders() {
+    if (!isset($this->folders)) {
+      $this->folders = $this->getComponentNames('profile', array_keys(drupal_system_listing('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.profile$/', 'profiles')));
+      $this->folders += $this->getComponentNames('module', array_keys(drupal_system_listing('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.module$/', 'modules', 'name', 0)));
+      $this->folders += $this->getComponentNames('theme', array_keys(drupal_system_listing('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.info.yml$/', 'themes')));
+    }
+    return $this->folders;
+  }
+
+}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/config/tests/config_test/lib/Drupal/config_test/TestSchemaStorage.php
@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\config_test\TestSchemaStorage.
+ */
+
+namespace Drupal\config_test;
+
+use Drupal\Core\Config\Schema\SchemaStorage;
+
+/**
+ * A test configuration schema storage to read configuration schema from all
+ * profiles, modules and themes regardless of installation status or installed
+ * profile.
+ */
+class TestSchemaStorage extends SchemaStorage {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getAllFolders() {
+    if (!isset($this->folders)) {
+      $this->folders = $this->getComponentNames('profile', array_keys(drupal_system_listing('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.profile$/', 'profiles')));
+      $this->folders += $this->getComponentNames('module', array_keys(drupal_system_listing('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.module$/', 'modules', 'name', 0)));
+      $this->folders += $this->getComponentNames('theme', array_keys(drupal_system_listing('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.info.yml$/', 'themes')));
+    }
+    return $this->folders;
+  }
+
+}