diff --git a/core/config/schema/core.data_types.schema.yml b/core/config/schema/core.data_types.schema.yml
index 0e589e1..5bbe16a 100644
--- a/core/config/schema/core.data_types.schema.yml
+++ b/core/config/schema/core.data_types.schema.yml
@@ -375,7 +375,7 @@ field_config_base:
       type: boolean
       label: 'Translatable'
     default_value:
-      type: field.[%parent.field_type].value
+      type: field.[%parent.field_type].single_value
     default_value_callback:
       type: string
       label: 'Default value callback'
@@ -414,14 +414,23 @@ core.date_format.*:
       type: string
       label: 'Default language'
 
-# Schema for the String field type.
+# Schema for the configuration of the String field type.
+
+field.string.storage_settings:
+  type: mapping
+  label: 'String settings'
+  mapping:
+    max_length:
+      type: integer
+      label: 'Maximum length'
 
 field.string.field_settings:
   type: sequence
   label: 'String settings'
-  sequence:
-    - type: string
-      label: 'Setting'
+
+field.string.single_value:
+  type: string
+  label: 'Value'
 
 field.string.value:
   type: sequence
@@ -431,10 +440,144 @@ field.string.value:
       label: 'Default'
       mapping:
         value:
-          type: string
-          label: 'Value'
+          type: field.string.single_value
+
+# Schema for the configuration of the  String (long) field type.
+
+field.string_long.storage_settings:
+  type: field.string.storage_settings
+  label: 'String (long) settings'
+
+field.string_long.field_settings:
+  type: field.string.field_settings
+  label: 'String (long) settings'
+
+field.string_long.single_value:
+  type: text
+  label: 'Value'
+
+field.string_long.value:
+  type: sequence
+  label: 'Default value'
+  sequence:
+    - type: mapping
+      label: 'Default'
+      mapping:
+        value:
+          type: field.string_long.single_value
+
+# Schema for the configuration of the URI field type.
+
+field.uri.storage_settings:
+  type: mapping
+  label: 'URI settings'
+  mapping:
+    max_length:
+      type: integer
+      label: 'Maximum length'
+
+field.uri.field_settings:
+  type: sequence
+  label: 'URI settings'
+
+field.uri.single_value:
+  type: string
+  label: 'Value'
+
+field.uri.value:
+  type: sequence
+  label: 'Default value'
+  sequence:
+    - type: mapping
+      label: 'Default'
+      mapping:
+        value:
+          type: field.uri.single_value
+
+# Schema for the configuration of the Created field type.
+
+field.created.storage_settings:
+  type: sequence
+  label: 'Created timestamp settings'
+
+field.created.field_settings:
+  type: sequence
+  label: 'Created timestamp settings'
+
+field.created.single_value:
+  type: integer
+  label: 'Value'
+
+field.created.value:
+  type: sequence
+  label: 'Default value'
+  sequence:
+    - type: mapping
+      label: 'Default'
+      mapping:
+        value:
+          type: field.created.single_value
+
+# Schema for the configuration of the Changed field type.
 
-# Schema for the configuration files of the Boolean field type.
+field.changed.storage_settings:
+  type: sequence
+  label: 'Changed timestamp settings'
+
+field.changed.field_settings:
+  type: sequence
+  label: 'Changed timestamp settings'
+
+field.changed.single_value:
+  type: integer
+  label: 'Value'
+
+field.changed.value:
+  type: sequence
+  label: 'Default value'
+  sequence:
+    - type: mapping
+      label: 'Default'
+      mapping:
+        value:
+          type: field.changed.single_value
+
+# Schema for the configuration of the Entity reference field type.
+
+field.entity_reference.storage_settings:
+  type: mapping
+  label: 'Entity reference settings'
+  mapping:
+    target_type:
+      type: string
+      label: 'Type of item to reference'
+
+field.entity_reference.field_settings:
+  type: mapping
+  label: 'Entity reference settings'
+  mapping:
+    handler:
+      type: string
+      label: 'Reference method'
+    handler_settings:
+      type: entity_reference.[%parent.handler].handler_settings
+      label: 'Reference method settings'
+
+field.entity_reference.single_value:
+  type: integer
+  label: 'Value'
+
+field.entity_reference.value:
+  type: sequence
+  label: 'Default value'
+  sequence:
+    - type: mapping
+      label: 'Default'
+      mapping:
+        target_id:
+          type: field.entity_reference.single_value
+
+# Schema for the configuration of the Boolean field type.
 
 field.boolean.storage_settings:
   type: mapping
@@ -449,8 +592,11 @@ field.boolean.storage_settings:
 
 field.boolean.field_settings:
   label: 'Boolean settings'
-  type: mapping
-  mapping: {  }
+  type: sequence
+
+field.boolean.single_value:
+  type: boolean
+  label: 'Value'
 
 field.boolean.value:
   type: sequence
@@ -460,10 +606,9 @@ field.boolean.value:
       label: 'Default'
       mapping:
         value:
-          type: integer
-          label: 'Value'
+          type: field.boolean.single_value
 
-# Schema for the configuration files of the Email field type.
+# Schema for the configuration of the Email field type.
 
 field.email.storage_settings:
   type: sequence
@@ -478,6 +623,10 @@ field.email.field_settings:
     - type: string
       label: 'Setting'
 
+field.email.single_value:
+  type: email
+  label: 'Value'
+
 field.email.value:
   type: sequence
   label: 'Default value'
@@ -486,10 +635,9 @@ field.email.value:
       label: 'Default'
       mapping:
         value:
-          type: email
-          label: 'Value'
+          type: field.email.single_value
 
-# Schema for configuration files of a numeric field types.
+# Schema for the configuration of the Integer field type.
 
 field.integer.storage_settings:
   type: sequence
@@ -515,6 +663,10 @@ field.integer.field_settings:
       type: string
       label: 'Suffix'
 
+field.integer.single_value:
+  type: integer
+  label: 'Value'
+
 field.integer.value:
   type: sequence
   label: 'Default value'
@@ -523,8 +675,9 @@ field.integer.value:
       label: 'Default value'
       mapping:
         value:
-          type: integer
-          label: 'Value'
+          type: field.integer.single_value
+
+# Schema for the configuration of the Decimal field type.
 
 field.decimal.storage_settings:
   type: mapping
@@ -554,6 +707,10 @@ field.decimal.field_settings:
       type: string
       label: 'Suffix'
 
+field.decimal.single_value:
+  type: float
+  label: 'Value'
+
 field.decimal.value:
    type: sequence
    label: 'Default value'
@@ -562,8 +719,9 @@ field.decimal.value:
        label: 'Default value'
        mapping:
          value:
-           type: float
-           label: 'Value'
+           type: field.decimal.single_value
+
+# Schema for the configuration of the Float field type.
 
 field.float.storage_settings:
   type: sequence
@@ -589,6 +747,10 @@ field.float.field_settings:
       type: string
       label: 'Suffix'
 
+field.float.single_value:
+  type: float
+  label: 'Value'
+
 field.float.value:
   type: sequence
   label: 'Default value'
@@ -597,5 +759,4 @@ field.float.value:
       label: 'Default value'
       mapping:
         value:
-          type: float
-          label: 'Value'
+          type: field.float.single_value
diff --git a/core/modules/content_translation/config/schema/content_translation.schema.yml b/core/modules/content_translation/config/schema/content_translation.schema.yml
index 6e4167e..db56a16 100644
--- a/core/modules/content_translation/config/schema/content_translation.schema.yml
+++ b/core/modules/content_translation/config/schema/content_translation.schema.yml
@@ -1,5 +1,23 @@
 # Schema for the Content Translation module.
 
+# @todo Refactor settings in https://www.drupal.org/node/2363155
+content_translation.settings:
+  type: sequence
+  label: 'Entity type'
+  sequence:
+    - type: sequence
+      label: 'Bundle'
+        - type: mapping
+          label: 'Settings'
+          mapping:
+            content_translation:
+              type: mapping
+              label: 'Content translation'
+              mapping:
+                enabled:
+                  type: boolean
+                  label: 'Enabled'
+
 field_config.third_party.content_translation:
   type: mapping
   label: 'Content translation field settings'
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php b/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php
index 98ea255..5ca67ab 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationSettingsTest.php
@@ -8,6 +8,7 @@
 namespace Drupal\content_translation\Tests;
 
 use Drupal\comment\Plugin\Field\FieldType\CommentItemInterface;
+use Drupal\config\Tests\SchemaCheckTestTrait;
 use Drupal\Core\Field\Entity\BaseFieldOverride;
 use Drupal\Core\Language\Language;
 use Drupal\field\Entity\FieldConfig;
@@ -20,6 +21,8 @@
  */
 class ContentTranslationSettingsTest extends WebTestBase {
 
+  use SchemaCheckTestTrait;
+
   /**
    * Modules to enable.
    *
@@ -178,6 +181,8 @@ function testSettingsUI() {
       $this->assertEqual($definitions['body']->isTranslatable(), $translatable, 'Field translatability correctly switched.');
       $this->assertEqual($field->isTranslatable(), $definitions['body']->isTranslatable(), 'Configurable field translatability correctly switched.');
     }
+
+    $this->assertAllConfigSchema();
   }
 
   /**
@@ -269,4 +274,18 @@ protected function entityManager() {
     return $this->container->get('entity.manager');
   }
 
+  /**
+   * Asserts all active configuration matches schemas.
+   */
+  protected function assertAllConfigSchema() {
+    $names = $this->container->get('config.storage')->listAll();
+    $factory = $this->container->get('config.factory');
+    /** @var \Drupal\Core\Config\TypedConfigManagerInterface $typed_config */
+    $typed_config = $this->container->get('config.typed');
+    foreach ($names as $name) {
+      $config = $factory->get($name);
+      $this->assertConfigSchema($typed_config, $name, $config->get());
+    }
+  }
+
 }
diff --git a/core/modules/entity_reference/config/schema/entity_reference.schema.yml b/core/modules/entity_reference/config/schema/entity_reference.schema.yml
index de96443..5404963 100644
--- a/core/modules/entity_reference/config/schema/entity_reference.schema.yml
+++ b/core/modules/entity_reference/config/schema/entity_reference.schema.yml
@@ -1,35 +1,5 @@
 # Schema for the configuration files of the Entity Reference module.
 
-field.entity_reference.storage_settings:
-  type: mapping
-  label: 'Entity reference settings'
-  mapping:
-    target_type:
-      type: string
-      label: 'Type of item to reference'
-
-field.entity_reference.field_settings:
-  type: mapping
-  label: 'Entity reference settings'
-  mapping:
-    handler:
-      type: string
-      label: 'Reference method'
-    handler_settings:
-      type: entity_reference.[%parent.handler].handler_settings
-      label: 'Reference method settings'
-
-field.entity_reference.value:
-  type: sequence
-  label: 'Default value'
-  sequence:
-    - type: mapping
-      label: 'Default'
-      mapping:
-        target_id:
-          type: integer
-          label: 'Value'
-
 entity_reference.default.handler_settings:
   type: mapping
   label: 'View handler settings'