diff --git a/core/config/schema/core.data_types.schema.yml b/core/config/schema/core.data_types.schema.yml
index 4968087..354d282 100644
--- a/core/config/schema/core.data_types.schema.yml
+++ b/core/config/schema/core.data_types.schema.yml
@@ -400,10 +400,12 @@ field_config_base:
 
 core.base_field_override.*.*.*:
   type: field_config_base
+  config_entity_type: base_field_override
   label: 'Base field bundle override'
 
 core.date_format.*:
   type: config_entity
+  config_entity_type: date_format
   label: 'Date format'
   mapping:
     id:
diff --git a/core/config/schema/core.entity.schema.yml b/core/config/schema/core.entity.schema.yml
index 90813e5..e4dbfae 100644
--- a/core/config/schema/core.entity.schema.yml
+++ b/core/config/schema/core.entity.schema.yml
@@ -2,6 +2,7 @@
 
 core.entity_view_mode.*.*:
   type: config_entity
+  config_entity_type: entity_view_mode
   label: 'Entity view mode settings'
   mapping:
     id:
@@ -19,6 +20,7 @@ core.entity_view_mode.*.*:
 
 core.entity_form_mode.*.*:
   type: config_entity
+  config_entity_type: entity_form_mode
   label: 'Entity form mode settings'
   mapping:
     id:
@@ -37,6 +39,7 @@ core.entity_form_mode.*.*:
 # Overview configuration information for view mode or form mode displays.
 core.entity_view_display.*.*.*:
   type: config_entity
+  config_entity_type: entity_view_display
   label: 'Entity display'
   mapping:
     id:
@@ -85,6 +88,7 @@ core.entity_view_display.*.*.*:
 # Overview configuration information for form mode displays.
 core.entity_form_display.*.*.*:
   type: config_entity
+  config_entity_type: entity_form_display
   label: 'Entity form display'
   mapping:
     id:
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
index 56603c7..fd0bbf7 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
@@ -10,7 +10,6 @@
 use Drupal\Component\Utility\SafeMarkup;
 use Drupal\Core\Cache\Cache;
 use Drupal\Core\Config\ConfigException;
-use Drupal\Core\Config\Schema\SchemaIncompleteException;
 use Drupal\Core\Entity\Entity;
 use Drupal\Core\Config\ConfigDuplicateUUIDException;
 use Drupal\Core\Entity\EntityStorageInterface;
@@ -276,14 +275,6 @@ public function toArray() {
     $entity_type = $this->getEntityType();
 
     $properties_to_export = $entity_type->getPropertiesToExport();
-    if (empty($properties_to_export)) {
-      $config_name = $entity_type->getConfigPrefix() . '.' . $this->id();
-      $definition = $this->getTypedConfig()->getDefinition($config_name);
-      if (!isset($definition['mapping'])) {
-        throw new SchemaIncompleteException(SafeMarkup::format('Incomplete or missing schema for @config_name', array('@config_name' => $config_name)));
-      }
-      $properties_to_export = array_combine(array_keys($definition['mapping']), array_keys($definition['mapping']));
-    }
 
     $id_key = $entity_type->getKey('id');
     foreach ($properties_to_export as $property_name => $export_name) {
@@ -304,15 +295,6 @@ public function toArray() {
   }
 
   /**
-   * Gets the typed config manager.
-   *
-   * @return \Drupal\Core\Config\TypedConfigManagerInterface
-   */
-  protected function getTypedConfig() {
-    return \Drupal::service('config.typed');
-  }
-
-  /**
    * {@inheritdoc}
    */
   public function preSave(EntityStorageInterface $storage) {
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityType.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityType.php
index f15eef5..7e8734d 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityType.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityType.php
@@ -8,6 +8,7 @@
 namespace Drupal\Core\Config\Entity;
 
 use Drupal\Core\Config\Entity\Exception\ConfigEntityStorageClassException;
+use Drupal\Core\Config\Schema\SchemaIncompleteException;
 use Drupal\Core\Entity\EntityType;
 use Drupal\Core\Config\ConfigPrefixLengthException;
 use Drupal\Component\Utility\SafeMarkup;
@@ -166,8 +167,8 @@ protected function checkStorageClass($class) {
    * {@inheritdoc}
    */
   public function getPropertiesToExport() {
-    if (!empty($this->config_export)) {
-      if (empty($this->mergedConfigExport)) {
+    if (empty($this->mergedConfigExport)) {
+      if (!empty($this->config_export)) {
         // Always add default properties to be exported.
         $this->mergedConfigExport = [
           'uuid' => 'uuid',
@@ -185,9 +186,24 @@ public function getPropertiesToExport() {
           }
         }
       }
-      return $this->mergedConfigExport;
+      else {
+        $definition = $this->getTypedConfig()->getDefinitionForEntityType($this->id());
+        if (!isset($definition['mapping'])) {
+          throw new SchemaIncompleteException(SafeMarkup::format('Incomplete or missing schema for @entity_type_id', ['@entity_type_id' => $this->id()]));
+        }
+        $this->mergedConfigExport = array_combine(array_keys($definition['mapping']), array_keys($definition['mapping']));
+      }
     }
-    return NULL;
+    return $this->mergedConfigExport;
+  }
+
+  /**
+   * Gets the typed config manager.
+   *
+   * @return \Drupal\Core\Config\TypedConfigManagerInterface
+   */
+  protected function getTypedConfig() {
+    return \Drupal::service('config.typed');
   }
 
 }
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityTypeInterface.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityTypeInterface.php
index 0f26ae0..586465a 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityTypeInterface.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityTypeInterface.php
@@ -64,9 +64,8 @@ public function getConfigPrefix();
   /**
    * Gets the config entity properties to export if declared on the annotation.
    *
-   * @return array|NULL
-   *   The properties to export or NULL if they can not be determine from the
-   *   config entity type annotation.
+   * @return array
+   *   The properties to export or an empty array if they can not be determined.
    */
   public function getPropertiesToExport();
 
diff --git a/core/lib/Drupal/Core/Config/TypedConfigManager.php b/core/lib/Drupal/Core/Config/TypedConfigManager.php
index 42756d6..e31eab6 100644
--- a/core/lib/Drupal/Core/Config/TypedConfigManager.php
+++ b/core/lib/Drupal/Core/Config/TypedConfigManager.php
@@ -43,6 +43,15 @@ class TypedConfigManager extends TypedDataManager implements TypedConfigManagerI
   protected $definitions;
 
   /**
+   * The array of plugin definitions that correspond to entity types.
+   *
+   * This array is keyed by entity type ID, not by plugin ID.
+   *
+   * @var array
+   */
+  protected $entityTypeDefinitions = [];
+
+  /**
    * Creates a new typed configuration manager.
    *
    * @param \Drupal\Core\Config\StorageInterface $configStorage
@@ -159,8 +168,26 @@ public function getDefinition($base_plugin_id, $exception_on_invalid = TRUE, $is
   /**
    * {@inheritdoc}
    */
+  public function getDefinitionForEntityType($entity_type_id) {
+    if (!isset($this->entityTypeDefinitions[$entity_type_id])) {
+      $id = 'undefined';
+      foreach ($this->getDefinitions() as $definition_id => $definition) {
+        if (isset($definition['config_entity_type']) && $definition['config_entity_type'] === $entity_type_id) {
+          $id = $definition_id;
+          break;
+        }
+      }
+      $this->entityTypeDefinitions[$entity_type_id] = $this->getDefinition($id);
+    }
+    return $this->entityTypeDefinitions[$entity_type_id];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function clearCachedDefinitions() {
     $this->schemaStorage->reset();
+    $this->entityTypeDefinitions = [];
     parent::clearCachedDefinitions();
   }
 
diff --git a/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php b/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php
index e9e562e..7aa1d33 100644
--- a/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php
+++ b/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php
@@ -122,4 +122,17 @@ public function hasConfigSchema($name);
    */
   public function getDefinition($plugin_id, $exception_on_invalid = TRUE, $is_config_name = FALSE);
 
+  /**
+   * Gets the plugin definition for a specific entity type.
+   *
+   * @param string $entity_type_id
+   *   The unique identifier of the entity type.
+   *
+   * @return array
+   *   A plugin definition array. If the given entity type ID does not have
+   *   typed configuration definition assigned, the definition of an undefined
+   *   element type is returned.
+   */
+  public function getDefinitionForEntityType($entity_type_id);
+
 }
diff --git a/core/modules/block/config/schema/block.schema.yml b/core/modules/block/config/schema/block.schema.yml
index 16d79bc..619ca1a 100644
--- a/core/modules/block/config/schema/block.schema.yml
+++ b/core/modules/block/config/schema/block.schema.yml
@@ -2,6 +2,7 @@
 
 block.block.*:
   type: config_entity
+  config_entity_type: block
   label: 'Block'
   mapping:
     id:
diff --git a/core/modules/block_content/config/schema/block_content.schema.yml b/core/modules/block_content/config/schema/block_content.schema.yml
index 2e7c338..b50cf97 100644
--- a/core/modules/block_content/config/schema/block_content.schema.yml
+++ b/core/modules/block_content/config/schema/block_content.schema.yml
@@ -2,6 +2,7 @@
 
 block_content.type.*:
   type: config_entity
+  config_entity_type: block_content
   label: 'Custom block type settings'
   mapping:
     id:
diff --git a/core/modules/comment/config/schema/comment.schema.yml b/core/modules/comment/config/schema/comment.schema.yml
index d9f5a77..37b9445 100644
--- a/core/modules/comment/config/schema/comment.schema.yml
+++ b/core/modules/comment/config/schema/comment.schema.yml
@@ -37,6 +37,7 @@ action.configuration.comment_unpublish_action:
 
 comment.type.*:
   type: config_entity
+  config_entity_type: comment_type
   label: 'Comment type settings'
   mapping:
     id:
diff --git a/core/modules/config/tests/config_test/config/schema/config_test.schema.yml b/core/modules/config/tests/config_test/config/schema/config_test.schema.yml
index 6cad91b..c00a3be 100644
--- a/core/modules/config/tests/config_test/config/schema/config_test.schema.yml
+++ b/core/modules/config/tests/config_test/config/schema/config_test.schema.yml
@@ -2,6 +2,7 @@
 
 config_test_dynamic:
   type: config_entity
+  config_entity_type: config_test
   mapping:
     id:
       type: string
@@ -35,6 +36,7 @@ config_test.dynamic.*.*:
 
 config_test.query.*:
   type: config_entity
+  config_entity_type: config_query_test
   mapping:
     id:
       type: string
diff --git a/core/modules/contact/config/schema/contact.schema.yml b/core/modules/contact/config/schema/contact.schema.yml
index 5a62e9d..52b17e3 100644
--- a/core/modules/contact/config/schema/contact.schema.yml
+++ b/core/modules/contact/config/schema/contact.schema.yml
@@ -2,6 +2,7 @@
 
 contact.form.*:
   type: config_entity
+  config_entity_type: contact_form
   label: 'Contact form'
   mapping:
     id:
diff --git a/core/modules/editor/config/schema/editor.schema.yml b/core/modules/editor/config/schema/editor.schema.yml
index 80a01f9..7a19628 100644
--- a/core/modules/editor/config/schema/editor.schema.yml
+++ b/core/modules/editor/config/schema/editor.schema.yml
@@ -2,6 +2,7 @@
 
 editor.editor.*:
   type: config_entity
+  config_entity_type: editor
   label: 'Text editor'
   mapping:
     format:
diff --git a/core/modules/field/config/schema/field.schema.yml b/core/modules/field/config/schema/field.schema.yml
index 55760a7..440abea 100644
--- a/core/modules/field/config/schema/field.schema.yml
+++ b/core/modules/field/config/schema/field.schema.yml
@@ -10,6 +10,7 @@ field.settings:
 
 field.storage.*.*:
   type: config_entity
+  config_entity_type: field_storage_config
   label: 'Field'
   mapping:
     id:
@@ -53,4 +54,5 @@ field.storage.*.*:
 
 field.field.*.*.*:
   type: field_config_base
+  config_entity_type: field_config
   label: 'Field'
diff --git a/core/modules/filter/config/schema/filter.schema.yml b/core/modules/filter/config/schema/filter.schema.yml
index b45a475..8e184d2 100644
--- a/core/modules/filter/config/schema/filter.schema.yml
+++ b/core/modules/filter/config/schema/filter.schema.yml
@@ -13,6 +13,7 @@ filter.settings:
 
 filter.format.*:
   type: config_entity
+  config_entity_type: filter_format
   label: 'Text formats'
   mapping:
     name:
diff --git a/core/modules/image/config/schema/image.schema.yml b/core/modules/image/config/schema/image.schema.yml
index 4949fa3..d26fd12 100644
--- a/core/modules/image/config/schema/image.schema.yml
+++ b/core/modules/image/config/schema/image.schema.yml
@@ -2,6 +2,7 @@
 
 image.style.*:
   type: config_entity
+  config_entity_type: image_style
   label: 'Image style'
   mapping:
     name:
diff --git a/core/modules/language/config/schema/language.schema.yml b/core/modules/language/config/schema/language.schema.yml
index 5e3f55b..767d47b 100644
--- a/core/modules/language/config/schema/language.schema.yml
+++ b/core/modules/language/config/schema/language.schema.yml
@@ -86,6 +86,7 @@ language.mappings:
 
 language.entity.*:
   type: config_entity
+  config_entity_type: configurable_language
   label: 'Language'
   mapping:
     id:
@@ -106,6 +107,7 @@ language.entity.*:
 
 language.content_settings.*.*:
   type: config_entity
+  config_entity_type: language_content_settings
   label: 'Content Language Settings'
   mapping:
     id:
diff --git a/core/modules/migrate/config/schema/migrate.schema.yml b/core/modules/migrate/config/schema/migrate.schema.yml
index c48bdd1..4e39577 100644
--- a/core/modules/migrate/config/schema/migrate.schema.yml
+++ b/core/modules/migrate/config/schema/migrate.schema.yml
@@ -2,6 +2,7 @@
 
 migrate.migration.*:
   type: config_entity
+  config_entity_type: migration
   label: 'Migration'
   mapping:
     id:
diff --git a/core/modules/node/config/schema/node.schema.yml b/core/modules/node/config/schema/node.schema.yml
index dbc8ac9..5fb8fdc 100644
--- a/core/modules/node/config/schema/node.schema.yml
+++ b/core/modules/node/config/schema/node.schema.yml
@@ -10,6 +10,7 @@ node.settings:
 
 node.type.*:
   type: config_entity
+  config_entity_type: node_type
   label: 'Content type'
   mapping:
     name:
diff --git a/core/modules/rdf/config/schema/rdf.schema.yml b/core/modules/rdf/config/schema/rdf.schema.yml
index a331382..27d8869 100644
--- a/core/modules/rdf/config/schema/rdf.schema.yml
+++ b/core/modules/rdf/config/schema/rdf.schema.yml
@@ -2,6 +2,7 @@
 
 rdf.mapping.*.*:
   type: config_entity
+  config_entity_type: rdf_mapping
   label: 'RDF mapping'
   mapping:
     id:
diff --git a/core/modules/responsive_image/config/schema/responsive_image.schema.yml b/core/modules/responsive_image/config/schema/responsive_image.schema.yml
index f05a8e2..f4d9ec8 100644
--- a/core/modules/responsive_image/config/schema/responsive_image.schema.yml
+++ b/core/modules/responsive_image/config/schema/responsive_image.schema.yml
@@ -2,6 +2,7 @@
 
 responsive_image.styles.*:
   type: config_entity
+  config_entity_type: responsive_image_style
   label: 'Responsive image style'
   mapping:
     id:
diff --git a/core/modules/search/config/schema/search.schema.yml b/core/modules/search/config/schema/search.schema.yml
index 2ed4c09..916186e 100644
--- a/core/modules/search/config/schema/search.schema.yml
+++ b/core/modules/search/config/schema/search.schema.yml
@@ -69,6 +69,7 @@ search.settings:
 
 search.page.*:
   type: config_entity
+  config_entity_type: search_page
   label: 'Search page'
   mapping:
     id:
diff --git a/core/modules/shortcut/config/schema/shortcut.schema.yml b/core/modules/shortcut/config/schema/shortcut.schema.yml
index 7d9420b..6d9b338 100644
--- a/core/modules/shortcut/config/schema/shortcut.schema.yml
+++ b/core/modules/shortcut/config/schema/shortcut.schema.yml
@@ -2,6 +2,7 @@
 
 shortcut.set.*:
   type: config_entity
+  config_entity_type: shortcut_set
   label: 'Shortcut settings'
   mapping:
     id:
diff --git a/core/modules/system/config/schema/system.schema.yml b/core/modules/system/config/schema/system.schema.yml
index 7cde50d..5da1d6a 100644
--- a/core/modules/system/config/schema/system.schema.yml
+++ b/core/modules/system/config/schema/system.schema.yml
@@ -242,6 +242,7 @@ system.theme:
 
 system.menu.*:
   type: config_entity
+  config_entity_type: menu
   label: 'Menu'
   mapping:
     id:
@@ -259,6 +260,7 @@ system.menu.*:
 
 system.action.*:
   type: config_entity
+  config_entity_type: action
   label: 'System action'
   mapping:
     id:
diff --git a/core/modules/taxonomy/config/schema/taxonomy.schema.yml b/core/modules/taxonomy/config/schema/taxonomy.schema.yml
index efa08e1..81d3ce6 100644
--- a/core/modules/taxonomy/config/schema/taxonomy.schema.yml
+++ b/core/modules/taxonomy/config/schema/taxonomy.schema.yml
@@ -16,6 +16,7 @@ taxonomy.settings:
 
 taxonomy.vocabulary.*:
   type: config_entity
+  config_entity_type: vocabulary
   label: 'Vocabulary'
   mapping:
     name:
diff --git a/core/modules/tour/config/schema/tour.schema.yml b/core/modules/tour/config/schema/tour.schema.yml
index caf7363..299d83e 100644
--- a/core/modules/tour/config/schema/tour.schema.yml
+++ b/core/modules/tour/config/schema/tour.schema.yml
@@ -2,6 +2,7 @@
 
 tour.tour.*:
   type: config_entity
+  config_entity_type: tour
   label: 'Tour settings'
   mapping:
     id:
diff --git a/core/modules/user/config/schema/user.schema.yml b/core/modules/user/config/schema/user.schema.yml
index 627d8a6..6e57fb8 100644
--- a/core/modules/user/config/schema/user.schema.yml
+++ b/core/modules/user/config/schema/user.schema.yml
@@ -105,6 +105,7 @@ user.flood:
 
 user.role.*:
   type: config_entity
+  config_entity_type: role
   label: 'User role settings'
   mapping:
     id:
diff --git a/core/modules/views/config/schema/views.schema.yml b/core/modules/views/config/schema/views.schema.yml
index 7ea599d..97403ee 100644
--- a/core/modules/views/config/schema/views.schema.yml
+++ b/core/modules/views/config/schema/views.schema.yml
@@ -67,6 +67,7 @@ views.settings:
 
 views.view.*:
   type: config_entity
+  config_entity_type: view
   label: 'View'
   mapping:
     id:
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityBaseUnitTest.php b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityBaseUnitTest.php
index b654077..f120c68 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityBaseUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityBaseUnitTest.php
@@ -82,13 +82,6 @@ class ConfigEntityBaseUnitTest extends UnitTestCase {
   protected $cacheTagsInvalidator;
 
   /**
-   * The mocked typed config manager.
-   *
-   * @var \Drupal\Core\Config\TypedConfigManagerInterface|\PHPUnit_Framework_MockObject_MockObject
-   */
-  protected $typedConfigManager;
-
-  /**
    * {@inheritdoc}
    */
   protected function setUp() {
@@ -124,14 +117,11 @@ protected function setUp() {
 
     $this->cacheTagsInvalidator = $this->getMock('Drupal\Core\Cache\CacheTagsInvalidatorInterface');
 
-    $this->typedConfigManager = $this->getMock('Drupal\Core\Config\TypedConfigManagerInterface');
-
     $container = new ContainerBuilder();
     $container->set('entity.manager', $this->entityManager);
     $container->set('uuid', $this->uuid);
     $container->set('language_manager', $this->languageManager);
     $container->set('cache_tags.invalidator', $this->cacheTagsInvalidator);
-    $container->set('config.typed', $this->typedConfigManager);
     \Drupal::setContainer($container);
 
     $this->entity = $this->getMockForAbstractClass('\Drupal\Core\Config\Entity\ConfigEntityBase', array($values, $this->entityTypeId));
@@ -463,8 +453,6 @@ public function testSort() {
    * @covers ::toArray
    */
   public function testToArray() {
-    $this->typedConfigManager->expects($this->never())
-      ->method('getDefinition');
     $this->entityType->expects($this->any())
       ->method('getPropertiesToExport')
       ->willReturn(['id' => 'configId', 'dependencies' => 'dependencies']);
@@ -485,8 +473,6 @@ public function testToArrayIdKey() {
       ->method('get')
       ->with('dependencies')
       ->willReturn([]);
-    $this->typedConfigManager->expects($this->never())
-      ->method('getDefinition');
     $this->entityType->expects($this->any())
       ->method('getPropertiesToExport')
       ->willReturn(['id' => 'configId', 'dependencies' => 'dependencies']);
@@ -500,33 +486,6 @@ public function testToArrayIdKey() {
   }
 
   /**
-   * @covers ::toArray
-   */
-  public function testToArraySchemaFallback() {
-    $this->typedConfigManager->expects($this->once())
-      ->method('getDefinition')
-      ->will($this->returnValue(array('mapping' => array('id' => '', 'dependencies' => ''))));
-    $this->entityType->expects($this->any())
-      ->method('getPropertiesToExport')
-      ->willReturn([]);
-    $properties = $this->entity->toArray();
-    $this->assertInternalType('array', $properties);
-    $this->assertEquals(array('id' => $this->entity->id(), 'dependencies' => array()), $properties);
-  }
-
-  /**
-   * @covers ::toArray
-   *
-   * @expectedException \Drupal\Core\Config\Schema\SchemaIncompleteException
-   */
-  public function testToArrayFallback() {
-    $this->entityType->expects($this->any())
-      ->method('getPropertiesToExport')
-      ->willReturn([]);
-    $this->entity->toArray();
-  }
-
-  /**
    * @covers ::getThirdPartySetting
    * @covers ::setThirdPartySetting
    * @covers ::getThirdPartySettings
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityStorageTest.php b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityStorageTest.php
index c4413eb..8707671 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityStorageTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityStorageTest.php
@@ -90,13 +90,6 @@ class ConfigEntityStorageTest extends UnitTestCase {
   protected $cacheTagsInvalidator;
 
   /**
-   * The mocked typed config manager.
-   *
-   * @var \Drupal\Core\Config\TypedConfigManagerInterface|\PHPUnit_Framework_MockObject_MockObject
-   */
-  protected $typedConfigManager;
-
-  /**
    * The configuration manager.
    *
    * @var \Drupal\Core\Config\ConfigManagerInterface|\PHPUnit_Framework_MockObject_MockObject
@@ -132,6 +125,13 @@ protected function setUp() {
     $this->entityType->expects($this->any())
       ->method('getListCacheTags')
       ->willReturn(array('test_entity_type_list'));
+    $this->entityType->expects($this->any())
+      ->method('getPropertiesToExport')
+      ->willReturn([
+        'id' => 'id',
+        'uuid' => 'uuid',
+        'dependencies' => 'dependencies',
+      ]);
 
     $this->moduleHandler = $this->getMock('Drupal\Core\Extension\ModuleHandlerInterface');
 
@@ -163,16 +163,10 @@ protected function setUp() {
 
     $this->cacheTagsInvalidator = $this->getMock('Drupal\Core\Cache\CacheTagsInvalidatorInterface');
 
-    $this->typedConfigManager = $this->getMock('Drupal\Core\Config\TypedConfigManagerInterface');
-    $this->typedConfigManager->expects($this->any())
-      ->method('getDefinition')
-      ->will($this->returnValue(array('mapping' => array('id' => '', 'uuid' => '', 'dependencies' => ''))));
-
     $this->configManager = $this->getMock('Drupal\Core\Config\ConfigManagerInterface');
 
     $container = new ContainerBuilder();
     $container->set('entity.manager', $this->entityManager);
-    $container->set('config.typed', $this->typedConfigManager);
     $container->set('cache_tags.invalidator', $this->cacheTagsInvalidator);
     $container->set('config.manager', $this->configManager);
     $container->set('language_manager', $this->languageManager);
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php
index 524fea0..1aea2f7 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityTypeTest.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Tests\Core\Config\Entity;
 
+use Drupal\Core\DependencyInjection\ContainerBuilder;
 use Drupal\Tests\UnitTestCase;
 use Drupal\Core\Config\Entity\ConfigEntityType;
 use Drupal\Component\Utility\SafeMarkup;
@@ -149,11 +150,6 @@ public function testGetPropertiesToExport($definition, $expected) {
   public function providerGetPropertiesToExport() {
     $data = [];
     $data[] = [
-      [],
-      NULL,
-    ];
-
-    $data[] = [
       [
         'config_export' => [
           'id',
@@ -187,4 +183,56 @@ public function providerGetPropertiesToExport() {
     return $data;
   }
 
+  /**
+   * @covers ::getPropertiesToExport
+   */
+  public function testGetPropertiesToExportFromSchema() {
+    $typed_config_manager = $this->getMock('Drupal\Core\Config\TypedConfigManagerInterface');
+    $typed_config_manager->expects($this->once())
+      ->method('getDefinitionForEntityType')
+      ->with('example_config_entity_type')
+      ->willReturn(['mapping' => ['id' => '', 'dependencies' => '']]);
+    $container = new ContainerBuilder();
+    $container->set('config.typed', $typed_config_manager);
+    \Drupal::setContainer($container);
+
+    $expected = [
+      'id' => 'id',
+      'dependencies' => 'dependencies',
+    ];
+    $entity_type = $this->setUpConfigEntityType([]);
+
+    $properties_to_export = $entity_type->getPropertiesToExport();
+    $this->assertSame($expected, $properties_to_export);
+
+    // Ensure the method is idempotent.
+    $properties_to_export = $entity_type->getPropertiesToExport();
+    $this->assertSame($expected, $properties_to_export);
+  }
+
+  /**
+   * @covers ::getPropertiesToExport
+   *
+   * @expectedException \Drupal\Core\Config\Schema\SchemaIncompleteException
+   * @expectedExceptionMessage Incomplete or missing schema for example_config_entity_type
+   */
+  public function testGetPropertiesToExportFromMissingSchema() {
+    $typed_config_manager = $this->getMock('Drupal\Core\Config\TypedConfigManagerInterface');
+    $typed_config_manager->expects($this->once())
+      ->method('getDefinitionForEntityType')
+      ->willReturn([]);
+    $container = new ContainerBuilder();
+    $container->set('config.typed', $typed_config_manager);
+    \Drupal::setContainer($container);
+
+    $expected = [];
+    $entity_type = $this->setUpConfigEntityType([]);
+    $properties_to_export = $entity_type->getPropertiesToExport();
+    $this->assertSame($expected, $properties_to_export);
+
+    // Ensure the method is idempotent.
+    $properties_to_export = $entity_type->getPropertiesToExport();
+    $this->assertSame($expected, $properties_to_export);
+  }
+
 }
diff --git a/core/tests/Drupal/Tests/Core/Config/TypedConfigManagerTest.php b/core/tests/Drupal/Tests/Core/Config/TypedConfigManagerTest.php
new file mode 100644
index 0000000..5432e2a
--- /dev/null
+++ b/core/tests/Drupal/Tests/Core/Config/TypedConfigManagerTest.php
@@ -0,0 +1,82 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Tests\Core\Config\TypedConfigManagerTest.
+ */
+
+namespace Drupal\Tests\Core\Config;
+
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * @coversDefaultClass \Drupal\Core\Config\TypedConfigManager
+ * @group Config
+ */
+class TypedConfigManagerTest extends UnitTestCase {
+
+  /**
+   * @covers ::getDefinitionForEntityType
+   *
+   * @dataProvider providerTestGetDefinitionForEntityType
+   */
+  public function testGetDefinitionForEntityType($entity_type_id, $expected) {
+    $definitions = [
+      'undefined' => [
+        'label' => 'Undefined',
+        'class' => '\Drupal\Core\Config\Schema\Undefined',
+      ],
+      'core.valid.*' => [
+        'label' => 'Valid',
+        'config_entity_type' => 'valid',
+      ],
+      'core.invalid.*' => [
+        'label' => 'invalid',
+      ],
+    ];
+
+    $manager = $this->getMockBuilder('\Drupal\Core\Config\TypedConfigManager')
+      ->disableOriginalConstructor()
+      ->setMethods(['getDefinitions'])
+      ->getMock();
+
+    // Once for the initial loop and once from within getDefinition().
+    $manager->expects($this->exactly(2))
+      ->method('getDefinitions')
+      ->willReturn($definitions);
+
+    $definition = $manager->getDefinitionForEntityType($entity_type_id);
+    $this->assertSame($expected, $definition);
+
+    // Ensure this doesn't loop over getDefinitions() twice.
+    $definition = $manager->getDefinitionForEntityType($entity_type_id);
+    $this->assertSame($expected, $definition);
+  }
+
+  /**
+   * Provides test data for testGetDefinitionForEntityType().
+   */
+  public function providerTestGetDefinitionForEntityType() {
+    $data = [];
+    $data[] = [
+      'valid',
+      [
+        'label' => 'Valid',
+        'config_entity_type' => 'valid',
+        'definition_class' => '\Drupal\Core\TypedData\DataDefinition',
+        'type' => 'core.valid.*',
+      ],
+    ];
+    $data[] = [
+      'invalid',
+      [
+        'label' => 'Undefined',
+        'class' => '\Drupal\Core\Config\Schema\Undefined',
+        'definition_class' => '\Drupal\Core\TypedData\DataDefinition',
+        'type' => 'undefined',
+      ],
+    ];
+    return $data;
+  }
+
+}