diff --git a/core/lib/Drupal/Core/Config/Schema/SchemaCheckTrait.php b/core/lib/Drupal/Core/Config/Schema/SchemaCheckTrait.php
index 00bbba5..5127adc 100644
--- a/core/lib/Drupal/Core/Config/Schema/SchemaCheckTrait.php
+++ b/core/lib/Drupal/Core/Config/Schema/SchemaCheckTrait.php
@@ -53,7 +53,7 @@ public function checkConfigSchema(TypedConfigManagerInterface $typed_config, $co
     if (!$typed_config->hasConfigSchema($config_name)) {
       return FALSE;
     }
-    $definition = $typed_config->getDefinition($config_name, TRUE, TRUE);
+    $definition = $typed_config->getDefinition($config_name);
     $data_definition = $typed_config->buildDataDefinition($definition, $config_data);
     $this->schema = $typed_config->create($data_definition, $config_data);
     $errors = array();
diff --git a/core/lib/Drupal/Core/Config/StorableConfigBase.php b/core/lib/Drupal/Core/Config/StorableConfigBase.php
index d4b1fb1..4af470e 100644
--- a/core/lib/Drupal/Core/Config/StorableConfigBase.php
+++ b/core/lib/Drupal/Core/Config/StorableConfigBase.php
@@ -128,7 +128,7 @@ public function getStorage() {
    */
   protected function getSchemaWrapper() {
     if (!isset($this->schemaWrapper)) {
-      $definition = $this->typedConfigManager->getDefinition($this->name, TRUE, TRUE);
+      $definition = $this->typedConfigManager->getDefinition($this->name);
       $data_definition = $this->typedConfigManager->buildDataDefinition($definition, $this->data);
       $this->schemaWrapper = $this->typedConfigManager->create($data_definition, $this->data);
     }
diff --git a/core/lib/Drupal/Core/Config/TypedConfigManager.php b/core/lib/Drupal/Core/Config/TypedConfigManager.php
index a086e34..244747a 100644
--- a/core/lib/Drupal/Core/Config/TypedConfigManager.php
+++ b/core/lib/Drupal/Core/Config/TypedConfigManager.php
@@ -72,7 +72,7 @@ public function __construct(StorageInterface $configStorage, StorageInterface $s
    */
   public function get($name) {
     $data = $this->configStorage->read($name);
-    $type_definition = $this->getDefinition($name, TRUE, TRUE);
+    $type_definition = $this->getDefinition($name);
     $data_definition = $this->buildDataDefinition($type_definition, $data);
     return $this->create($data_definition, $data);
   }
diff --git a/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php b/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php
index 402cb82..e9e562e 100644
--- a/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php
+++ b/core/lib/Drupal/Core/Config/TypedConfigManagerInterface.php
@@ -111,8 +111,8 @@ public function hasConfigSchema($name);
    *   Ignored with TypedConfigManagerInterface. Kept for compatibility with
    *   DiscoveryInterface.
    * @param bool $is_config_name
-   *   Set to TRUE if $plugin_id is a configuration name (as opposed to an
-   *   internal configuration schema type).
+   *   (deprecated) Set to TRUE if $plugin_id is a configuration name (as
+   *   opposed to an internal configuration schema type).
    *
    * @return array
    *   A plugin definition array. If the given plugin id does not have typed
diff --git a/core/modules/locale/src/LocaleConfigManager.php b/core/modules/locale/src/LocaleConfigManager.php
index 17d1e8f..d10cf18 100644
--- a/core/modules/locale/src/LocaleConfigManager.php
+++ b/core/modules/locale/src/LocaleConfigManager.php
@@ -134,7 +134,7 @@ public function getTranslatableDefaultConfig($name) {
     if ($this->isSupported($name)) {
       // Create typed configuration wrapper based on install storage data.
       $data = $this->installStorageRead($name);
-      $type_definition = $this->typedConfigManager->getDefinition($name, TRUE, TRUE);
+      $type_definition = $this->typedConfigManager->getDefinition($name);
       $data_definition = $this->typedConfigManager->buildDataDefinition($type_definition, $data);
       $typed_config = $this->typedConfigManager->create($data_definition, $data);
       if ($typed_config instanceof TraversableTypedDataInterface) {