diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTestBase.php b/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTestBase.php
index 61eee7e..dfde454 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTestBase.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTestBase.php
@@ -2,11 +2,12 @@
 
 /**
  * @file
- * Contains Drupal\config\Tests\DefaultConfigTest.
+ * Contains Drupal\config\Tests\ConfigSchemaTestBase.
  */
 
 namespace Drupal\config\Tests;
 
+use Drupal\Core\Config\Schema\ArrayElement;
 use Drupal\Core\Config\Schema\Property;
 use Drupal\Core\Config\TypedConfigManagerInterface;
 use Drupal\Core\TypedData\Type\BooleanInterface;
@@ -38,6 +39,8 @@
   protected $configName;
 
   /**
+   * Global state for whether the config passed for a name.
+   *
    * @var boolean
    */
   protected $configPass;
@@ -110,17 +113,13 @@ protected function checkValue($key, $value) {
           if ($type == 'string' && ($element instanceof StringInterface || $element instanceof Property)) {
             $success = TRUE;
           }
-          // Null values are allowed for all types.
+          // Null values are allowed for all scalar types.
           if ($value === NULL) {
             $success = TRUE;
           }
         }
-        else {
-          // @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) {
+          $class = get_class($element);
           $this->fail("{$this->configName}:$key has the wrong schema. Variable type is $type and schema class is $class.");
         }
       }
@@ -129,7 +128,18 @@ protected function checkValue($key, $value) {
       }
     }
     else {
-      // Any non-scalar value must be an array.
+      try {
+        $element = $this->schema->get($key);
+        if (!$element instanceof ArrayElement) {
+          $this->fail("{$this->configName}:$key is not defined as an array type (eg. mapping or sequence) but is not a scalar value.");
+        }
+      }
+      catch (SchemaIncompleteException $e) {
+        $this->fail("{$this->configName}:$key has no schema.");
+      }
+
+      // Go on processing so we can get errors on all levels. Any non-scalar
+      // value must be an array so cast to an array.
       if (!is_array($value)) {
         $value = (array) $value;
       }
diff --git a/core/modules/update/tests/modules/update_test/config/schema/update_test.schema.yml b/core/modules/update/tests/modules/update_test/config/schema/update_test.schema.yml
index cbe32d4..2235f2b 100644
--- a/core/modules/update/tests/modules/update_test/config/schema/update_test.schema.yml
+++ b/core/modules/update/tests/modules/update_test/config/schema/update_test.schema.yml
@@ -5,19 +5,19 @@ update_test.settings:
   label: 'Update test settings'
   mapping:
     system_info:
-      type: seqeuence
+      type: sequence
       label: 'System info'
       sequence:
         - type: string
           label: 'Value'
     update_status:
-      type: seqeuence
+      type: sequence
       label: 'Update status'
       sequence:
         - type: string
           label: 'Value'
     xml_map:
-      type: seqeuence
+      type: sequence
       label: 'XML map'
       sequence:
         - type: string
diff --git a/core/modules/user/config/schema/user.schema.yml b/core/modules/user/config/schema/user.schema.yml
index 7f61921..f8f0d2e 100644
--- a/core/modules/user/config/schema/user.schema.yml
+++ b/core/modules/user/config/schema/user.schema.yml
@@ -171,3 +171,7 @@ action.configuration.user_remove_role_action:
 action.configuration.user_unblock_user_action:
   type: action_configuration_default
   label: 'Unblock the selected users configuration'
+
+search.plugin.user_search:
+  type: mapping
+  label: 'User search'
diff --git a/core/modules/views/config/schema/views.argument_validator.schema.yml b/core/modules/views/config/schema/views.argument_validator.schema.yml
index 3dbc9d7..ba0f894 100644
--- a/core/modules/views/config/schema/views.argument_validator.schema.yml
+++ b/core/modules/views/config/schema/views.argument_validator.schema.yml
@@ -22,8 +22,11 @@ views.argument_validator_entity:
   type: mapping
   mapping:
     bundles:
-      type: boolean
+      type: sequence
       label: 'Bundles'
+      sequence:
+        label: 'Bundle'
+        type: string
     access:
       type: boolean
       label: 'Access'
diff --git a/core/modules/views/config/schema/views.data_types.schema.yml b/core/modules/views/config/schema/views.data_types.schema.yml
index efbf369..9fa51ed 100644
--- a/core/modules/views/config/schema/views.data_types.schema.yml
+++ b/core/modules/views/config/schema/views.data_types.schema.yml
@@ -55,6 +55,8 @@ views_display:
           label: 'Cache type'
         provider:
           label: 'Provider'
+        options:
+          label: 'Options'
     empty:
       type: sequence
       label: 'No results behavior'