diff --git a/core/modules/action/tests/action_bulk_test/config/views.view.test_bulk_form.yml b/core/modules/action/tests/action_bulk_test/config/views.view.test_bulk_form.yml
index 330bc4e..ff05d91 100644
--- a/core/modules/action/tests/action_bulk_test/config/views.view.test_bulk_form.yml
+++ b/core/modules/action/tests/action_bulk_test/config/views.view.test_bulk_form.yml
@@ -30,7 +30,7 @@ display:
           row_class: ''
           default_row_class: true
           row_class_special: true
-          override: false
+          override: true
           sticky: false
           summary: ''
           columns:
diff --git a/core/modules/aggregator/tests/modules/aggregator_test_views/test_views/views.view.test_aggregator_items.yml b/core/modules/aggregator/tests/modules/aggregator_test_views/test_views/views.view.test_aggregator_items.yml
index 34ce767..0d6dcbb 100644
--- a/core/modules/aggregator/tests/modules/aggregator_test_views/test_views/views.view.test_aggregator_items.yml
+++ b/core/modules/aggregator/tests/modules/aggregator_test_views/test_views/views.view.test_aggregator_items.yml
@@ -4,6 +4,17 @@ core: 8.x
 description: ''
 status: true
 display:
+  feed_1:
+    display_plugin: feed
+    id: feed_1
+    display_title: Feed
+    position: null
+    display_options:
+      path: test-aggregator-items-feed
+      row:
+        type: aggregator_rss
+        options:
+          item_length: default
   default:
     display_plugin: default
     id: default
@@ -36,32 +47,32 @@ display:
           id: title
           plugin_id: aggregator_title_link
           alter:
-            alter_text:
+            alter_text: false
             text: ''
-            make_link: '0'
+            make_link: false
             path: ''
-            absolute: '0'
-            external: '0'
-            replace_spaces: '0'
+            absolute: false
+            external: false
+            replace_spaces: false
             path_case: none
-            trim_whitespace: '0'
+            trim_whitespace: false
             alt: ''
             rel: ''
             link_class: ''
             prefix: ''
             suffix: ''
             target: ''
-            nl2br: '0'
+            nl2br: false
             max_length: ''
-            word_boundary: '1'
-            ellipsis: '1'
-            more_link: '0'
+            word_boundary: true
+            ellipsis: true
+            more_link: false
             more_link_text: ''
             more_link_path: ''
-            strip_tags: '0'
-            trim: '0'
+            strip_tags: false
+            trim: false
             preserve_tags: ''
-            html: '0'
+            html: false
         timestamp:
           table: aggregator_item
           field: timestamp
@@ -150,19 +161,9 @@ display:
           plugin_id: aggregator_xss
       filters: {  }
       sorts: {  }
-  feed_1:
-    display_plugin: feed
-    id: feed_1
-    display_title: Feed
-    position: null
-    display_options:
-      path: test-aggregator-items-feed
-      row:
-        type: aggregator_rss
-        options:
-          item_length: default
 label: test_aggregator_items
 module: views
 id: test_aggregator_items
 tag: ''
 langcode: en
+uuid: 19dd643f-9324-44df-ac72-0be915b334d1
diff --git a/core/modules/comment/config/schema/comment.views.schema.yml b/core/modules/comment/config/schema/comment.views.schema.yml
index ae7cd67..3a95f9d 100644
--- a/core/modules/comment/config/schema/comment.views.schema.yml
+++ b/core/modules/comment/config/schema/comment.views.schema.yml
@@ -64,7 +64,7 @@ views.field.comment_link_reply:
 
 views.field.node_new_comments:
   type: views.field.numeric
-  label: 'Number of new comment'
+  label: 'Number of new comments'
   mapping:
     link_to_comment:
       type: boolean
diff --git a/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_row.yml b/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_row.yml
index 9f3d6b0..5a50bbf 100644
--- a/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_row.yml
+++ b/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_row.yml
@@ -4,6 +4,13 @@ core: 8.x
 description: ''
 status: true
 display:
+  page_1:
+    display_plugin: page
+    id: page_1
+    display_title: Page
+    position: 1
+    display_options:
+      path: test-comment-row
   default:
     display_plugin: default
     id: default
@@ -23,7 +30,7 @@ display:
           disable_sql_rewrite: false
           distinct: false
           slave: false
-          query_comment: ''
+          query_comment: false
           query_tags: {  }
       exposed_form:
         type: basic
@@ -32,7 +39,7 @@ display:
           reset_button: false
           reset_button_label: Reset
           exposed_sorts_label: 'Sort by'
-          expose_sort_order: 1
+          expose_sort_order: true
           sort_asc_label: Asc
           sort_desc_label: Desc
       pager:
@@ -41,14 +48,14 @@ display:
           items_per_page: 10
           offset: 0
           id: 0
-          total_pages: ''
+          total_pages: null
           expose:
             items_per_page: false
             items_per_page_label: 'Items per page'
-            items_per_page_options: 5, 10, 20, 40, 60
-            items_per_page_options_all: 0
+            items_per_page_options: '5, 10, 20, 40, 60'
+            items_per_page_options_all: false
             items_per_page_options_all_label: '- All -'
-            offset: 0
+            offset: false
             offset_label: Offset
           tags:
             previous: '‹ previous'
@@ -98,7 +105,7 @@ display:
           element_class: ''
           element_label_type: ''
           element_label_class: ''
-          element_label_colon:  true
+          element_label_colon: true
           element_wrapper_type: ''
           element_wrapper_class: ''
           element_default_classes: true
@@ -107,21 +114,21 @@ display:
           link_to_node: false
       filters:
         status:
-          value: true
+          value: '1'
           table: comment
           field: status
           id: status
           expose:
-            operator: false
+            operator: ''
           group: 1
         status_node:
-          value: 1
+          value: '1'
           table: node_field_data
           field: status
           relationship: node
           id: status_node
           expose:
-            operator: false
+            operator: ''
           group: 1
       sorts: {  }
       title: test_comment_row
@@ -129,15 +136,9 @@ display:
       footer: {  }
       empty: {  }
       arguments: {  }
-  page_1:
-    display_plugin: page
-    id: page_1
-    display_title: Page
-    position: 1
-    display_options:
-      path: test-comment-row
 label: test_comment_row
 module: views
 id: test_comment_row
 tag: ''
 langcode: en
+uuid: fb77b691-eeef-4ac8-8382-15f5fd25aae0
diff --git a/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_rss.yml b/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_rss.yml
index 58293ae..e6facd9 100644
--- a/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_rss.yml
+++ b/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_rss.yml
@@ -2,8 +2,15 @@ base_field: cid
 base_table: comment
 core: 8.x
 description: ''
-status: 1
+status: true
 display:
+  feed_1:
+    display_plugin: feed
+    id: feed_1
+    display_title: Feed
+    position: null
+    display_options:
+      path: test-comment-rss
   default:
     display_plugin: default
     id: default
@@ -28,7 +35,7 @@ display:
         node:
           field: node
           id: node
-          required: 1
+          required: true
           table: comment
           provider: views
       fields:
@@ -39,28 +46,23 @@ display:
           plugin_id: comment
           label: ''
           alter:
-            alter_text: 0
-            make_link: 0
-            absolute: 0
-            trim: 0
-            word_boundary: 0
-            ellipsis: 0
-            strip_tags: 0
-            html: 0
-          hide_empty: 0
-          empty_zero: 0
-          link_to_comment: 1
+            alter_text: false
+            make_link: false
+            absolute: false
+            trim: false
+            word_boundary: false
+            ellipsis: false
+            strip_tags: false
+            html: false
+          hide_empty: false
+          empty_zero: false
+          link_to_comment: true
           provider: comment
       filters: {  }
       sorts: {  }
-  feed_1:
-    display_plugin: feed
-    id: feed_1
-    display_title: Feed
-    position: null
-    display_options:
-      path: test-comment-rss
 label: test_comment_rss
 module: views
 id: test_comment_rss
 tag: ''
+uuid: 0a29eea8-0dc4-45bd-a6d2-4b3ae711c7d4
+langcode: und
diff --git a/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_user_uid.yml b/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_user_uid.yml
index ab94876..e518584 100644
--- a/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_user_uid.yml
+++ b/core/modules/comment/tests/modules/comment_test_views/test_views/views.view.test_comment_user_uid.yml
@@ -1,7 +1,7 @@
 base_table: node
-core: 8
+core: '8'
 description: ''
-status: 1
+status: true
 display:
   default:
     display_options:
@@ -9,7 +9,7 @@ display:
         type: perm
       arguments:
         uid_touch:
-          default_argument_skip_url: 0
+          default_argument_skip_url: false
           default_argument_type: fixed
           field: uid_touch
           id: uid_touch
@@ -36,7 +36,7 @@ display:
         type: full
       query:
         options:
-          query_comment: 0
+          query_comment: false
         type: views_query
       style:
         type: default
@@ -49,3 +49,7 @@ display:
 label: test_comment_user_uid
 id: test_comment_user_uid
 tag: default
+base_field: nid
+module: comment_test_views
+uuid: 8f8244da-6e5e-4a8c-a17a-13ae6a3e4a88
+langcode: und
diff --git a/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php b/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php
index c505bab..52fc732 100644
--- a/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/DefaultConfigTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\config\Tests\DefaultConfigTest.
+ * Contains Drupal\config\Tests\DefaultConfigTest.
  */
 
 namespace Drupal\config\Tests;
@@ -12,7 +12,6 @@
 use Drupal\Core\TypedData\Type\BooleanInterface;
 use Drupal\Core\TypedData\Type\StringInterface;
 use Drupal\simpletest\DrupalUnitTestBase;
-use Drupal\simpletest\WebTestBase;
 use Drupal\Component\Utility\String;
 use Drupal\Core\Config\Schema\SchemaIncompleteException;
 use Drupal\Core\TypedData\PrimitiveInterface;
@@ -43,6 +42,9 @@ class DefaultConfigTest extends DrupalUnitTestBase {
    */
   protected $configPass;
 
+  /**
+   * {@inheritdoc}
+   */
   public static function getInfo() {
     return array(
       'name' => 'Default configuration',
@@ -51,6 +53,9 @@ public static function getInfo() {
     );
   }
 
+  /**
+   * Tests default configuration data type.
+   */
   public function testDefaultConfig() {
     /** @var \Drupal\Core\Config\TypedConfigManager $typed_config */
     $typed_config = $this->container->get('config.typed');
@@ -88,6 +93,14 @@ public function testDefaultConfig() {
     }
   }
 
+  /**
+   * Helper method to check data type.
+   *
+   * @param $key
+   * @param $value
+   *
+   * @return array
+   */
   protected function checkValue($key, $value) {
     if (is_scalar($value) || $value === NULL) {
       try {
@@ -113,16 +126,13 @@ protected function checkValue($key, $value) {
           }
         }
         else {
-          // Hmmm?
+          // @todo throw an exception due to an incomplete schema. Only possible
+          //   once https://drupal.org/node/1910624 is complete.
         }
         $class = get_class($element);
         if (!$success) {
           $this->fail("{$this->configName}:$key has the wrong schema. Variable type is $type and schema class is $class.");
         }
-        //else {
-        //  $this->pass("{$this->configName}:$key has the correct schema. Variable type is $type and schema class is $class.");
-        //}
-
       }
       catch (SchemaIncompleteException $e) {
         $this->fail("{$this->configName}:$key has no schema.");
@@ -141,6 +151,9 @@ protected function checkValue($key, $value) {
     return $value;
   }
 
+  /**
+   * {@inheritdoc}
+   */
   protected function fail($message = NULL, $group = 'Other') {
     $this->configPass = FALSE;
     return parent::fail($message, $group);
diff --git a/core/modules/datetime/config/schema/datetime.schema.yml b/core/modules/datetime/config/schema/datetime.schema.yml
index 9369168..bd64841 100644
--- a/core/modules/datetime/config/schema/datetime.schema.yml
+++ b/core/modules/datetime/config/schema/datetime.schema.yml
@@ -72,4 +72,4 @@ entity_form_display.field.datetime_default:
       type: sequence
       label: 'Settings'
       sequence:
-        - type: string
\ No newline at end of file
+        - type: string
diff --git a/core/modules/entity/config/schema/entity.data_types.yml b/core/modules/entity/config/schema/entity.data_types.yml
index 49dbb9a..51b118a 100644
--- a/core/modules/entity/config/schema/entity.data_types.yml
+++ b/core/modules/entity/config/schema/entity.data_types.yml
@@ -1,6 +1,6 @@
 # Schema for entity fields, specifying generic component data type information.
 
-# Schema for the base of the view mode or form mode display format settings.
+# Schema for the base of the view mode display format settings.
 entity_field_display_base:
   type: mapping
   mapping:
@@ -14,7 +14,7 @@ entity_field_display_base:
       type: integer
       label: 'Weight'
 
-# Schema for the base of the view mode or form mode display format settings.
+# Schema for the base of the form mode display format settings.
 entity_field_form_display_base:
   type: mapping
   mapping:
diff --git a/core/modules/entity/config/schema/entity.schema.yml b/core/modules/entity/config/schema/entity.schema.yml
index 5f483b5..ba30475 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'
 
-# for hidden, there is no type.
+# Default schemas, as no type for hidden.
 entity_display.field.*:
   type: mapping
   label: 'Entity display default'
diff --git a/core/modules/entity_reference/tests/modules/entity_reference_test/config/views.view.test_entity_reference.yml b/core/modules/entity_reference/tests/modules/entity_reference_test/config/views.view.test_entity_reference.yml
index 1e5c2d9..fbe112a 100644
--- a/core/modules/entity_reference/tests/modules/entity_reference_test/config/views.view.test_entity_reference.yml
+++ b/core/modules/entity_reference/tests/modules/entity_reference_test/config/views.view.test_entity_reference.yml
@@ -1,9 +1,25 @@
 base_field: nid
 base_table: node
-core: 8.x
+core: '8'
 description: ''
 status: true
 display:
+  entity_reference_1:
+    display_plugin: entity_reference
+    id: entity_reference_1
+    display_title: EntityReference
+    position: null
+    display_options:
+      style:
+        type: entity_reference
+        options:
+          grouping: {  }
+          search_fields:
+            title: title
+      pager:
+        type: none
+        options:
+          offset: 0
   default:
     display_plugin: default
     id: default
@@ -95,22 +111,6 @@ display:
           order: DESC
           plugin_id: date
           provider: views
-  entity_reference_1:
-    display_plugin: entity_reference
-    id: entity_reference_1
-    display_title: EntityReference
-    position: null
-    display_options:
-      style:
-        type: entity_reference
-        options:
-          grouping: {  }
-          search_fields:
-            title: title
-      pager:
-        type: none
-        options:
-          offset: 0
 label: 'Entity reference'
 module: entity_reference_test
 id: test_entity_reference