diff --git a/core/lib/Drupal/Core/Config/Config.php b/core/lib/Drupal/Core/Config/Config.php
index 533c24a..a743442 100644
--- a/core/lib/Drupal/Core/Config/Config.php
+++ b/core/lib/Drupal/Core/Config/Config.php
@@ -625,8 +625,8 @@ protected function castValue($key, $value) {
         }
       }
       catch (SchemaIncompleteException $e) {
-        // @todo throw an exception due to an incomplete schema. Only possible
-        //   once https://drupal.org/node/1910624 is complete.
+        // @todo throw an exception due to an incomplete schema.
+        // Fix as part of https://drupal.org/node/2183983.
       }
     }
     else {
diff --git a/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php b/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php
index 9fa2493..b16f038 100644
--- a/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php
@@ -21,7 +21,7 @@
 use Drupal\Core\TypedData\Type\IntegerInterface;
 
 /**
- *
+ * Tests default configuration availability and type with configuration schema.
  */
 class DefaultConfigTest extends DrupalUnitTestBase {
 
@@ -79,7 +79,7 @@ public function testDefaultConfig() {
     $default_config_storage = new TestInstallStorage();
 
     foreach ($default_config_storage->listAll() as $config_name) {
-      // @todo: remove once migration and
+      // @todo: remove once migration (https://drupal.org/node/2183957) and
       // translation (https://drupal.org/node/2168609) schemas are in.
       if (strpos($config_name, 'migrate.migration') === 0 || strpos($config_name, 'language.config') === 0) {
         continue;
@@ -113,10 +113,13 @@ public function testDefaultConfig() {
   /**
    * Helper method to check data type.
    *
-   * @param $key
-   * @param $value
+   * @param string $key
+   *   A string of configuration key.
+   * @param mixed $value
+   *   Value of given key.
    *
-   * @return array
+   * @return mixed
+   *   Returns mixed value.
    */
   protected function checkValue($key, $value) {
     if (is_scalar($value) || $value === NULL) {
diff --git a/core/modules/config/tests/config_test/lib/Drupal/config_test/TestInstallStorage.php b/core/modules/config/tests/config_test/lib/Drupal/config_test/TestInstallStorage.php
index e6ab912..c940422 100644
--- a/core/modules/config/tests/config_test/lib/Drupal/config_test/TestInstallStorage.php
+++ b/core/modules/config/tests/config_test/lib/Drupal/config_test/TestInstallStorage.php
@@ -10,6 +10,8 @@
 use Drupal\Core\Config\InstallStorage;
 
 /**
+ * Tests configuration of profiles, modules and themes.
+ *
  * A test configuration storage to read configuration from all profiles, modules
  * and themes regardless of installation status or installed profile.
  */
diff --git a/core/modules/config/tests/config_test/lib/Drupal/config_test/TestSchemaStorage.php b/core/modules/config/tests/config_test/lib/Drupal/config_test/TestSchemaStorage.php
index e62720f..4a599fd 100644
--- a/core/modules/config/tests/config_test/lib/Drupal/config_test/TestSchemaStorage.php
+++ b/core/modules/config/tests/config_test/lib/Drupal/config_test/TestSchemaStorage.php
@@ -10,6 +10,8 @@
 use Drupal\Core\Config\Schema\SchemaStorage;
 
 /**
+ * Tests configuration schemas of profiles, modules and themes.
+ *
  * A test configuration schema storage to read configuration schema from all
  * profiles, modules and themes regardless of installation status or installed
  * profile.
diff --git a/core/modules/content_translation/config/schema/content_translation.views.schema.yml b/core/modules/content_translation/config/schema/content_translation.views.schema.yml
index c60e4a4..03dfc1a 100644
--- a/core/modules/content_translation/config/schema/content_translation.views.schema.yml
+++ b/core/modules/content_translation/config/schema/content_translation.views.schema.yml
@@ -1,4 +1,4 @@
-# Schema for the views plugins of the Views module.
+# Schema for the views plugins of the Content Translation module.
 
 views.field.content_translation_link:
   type: views_field
diff --git a/core/modules/entity/config/schema/entity.schema.yml b/core/modules/entity/config/schema/entity.schema.yml
index ba30475..a5c7da8 100644
--- a/core/modules/entity/config/schema/entity.schema.yml
+++ b/core/modules/entity/config/schema/entity.schema.yml
@@ -116,7 +116,7 @@ entity.form_display.*.*.*:
       type: boolean
       label: 'Enabled'
 
-# Default schemas, as no type for hidden.
+# Default schema for entity display field with undefined type.
 entity_display.field.*:
   type: mapping
   label: 'Entity display default'
@@ -128,6 +128,7 @@ entity_display.field.*:
       type: integer
       label: 'Weight'
 
+# Default schema for entity form display field with undefined type.
 entity_form_display.field.*:
   type: mapping
   label: 'Entity form display default'
diff --git a/core/modules/node/config/schema/node.views.schema.yml b/core/modules/node/config/schema/node.views.schema.yml
index 4d6ab2c..0852a80 100644
--- a/core/modules/node/config/schema/node.views.schema.yml
+++ b/core/modules/node/config/schema/node.views.schema.yml
@@ -255,4 +255,4 @@ views.row.node_rss:
       label: 'Display type'
     links:
       type: boolean
-      label: 'Display links'
\ No newline at end of file
+      label: 'Display links'
diff --git a/core/modules/rest/config/schema/rest.schema.yml b/core/modules/rest/config/schema/rest.schema.yml
index b6afddc..b9cb652 100644
--- a/core/modules/rest/config/schema/rest.schema.yml
+++ b/core/modules/rest/config/schema/rest.schema.yml
@@ -23,7 +23,6 @@ rest_resource:
     PATCH:
       type: rest_request
       label: 'PATCH method settings'
-
     DELETE:
       type: rest_request
       label: 'DELETE method settings'
diff --git a/core/modules/system/config/schema/system.schema.yml b/core/modules/system/config/schema/system.schema.yml
index d77bb95..5dbdcbf 100644
--- a/core/modules/system/config/schema/system.schema.yml
+++ b/core/modules/system/config/schema/system.schema.yml
@@ -485,4 +485,4 @@ system.theme.disabled:
   label: 'Disabled themes'
   sequence:
     - type: string
-      label: 'Theme'
\ No newline at end of file
+      label: 'Theme'