diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTest.php b/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTest.php
index e701d39..947c027 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTest.php
@@ -114,17 +114,18 @@ function testSchemaMapping() {
       'label' => 'Weight',
       'type' => 'integer',
     );
-    $this->assertEqual($definition, $expected, 'Retrieved the right metadata for config_schema_test.ignore');
+    $this->assertEqual($definition, $expected);
 
     // The ignore elements themselves.
-    $definition = \Drupal::service('config.typed')->getDefinition('config_schema_test.ignore.irrelevant');
+    $definition = \Drupal::service('config.typed')->get('config_schema_test.ignore')->get('irrelevant')->getDataDefinition();
     $expected = array();
-    $expected['label'] = 'Irrelevant';
     $expected['type'] = 'ignore';
-    $this->assertEqual($definition, $expected, 'Retrieved the right metadata for config_schema_test.ignore.irrelevant');
-    $definition = \Drupal::service('config.typed')->getDefinition('config_schema_test.ignore.indescribable');
+    $expected['label'] = 'Irrelevant';
+    $expected['class'] = '\Drupal\Core\Config\Schema\Ignore';
+    $this->assertEqual($definition, $expected);
+    $definition = \Drupal::service('config.typed')->get('config_schema_test.ignore')->get('indescribable')->getDataDefinition();
     $expected['label'] = 'Indescribable';
-    $this->assertEqual($definition, $expected, 'Retrieved the right metadata for config_schema_test.ignore.indescribable');
+    $this->assertEqual($definition, $expected);
 
     // More complex case, generic type. Metadata for image style.
     $definition = \Drupal::service('config.typed')->getDefinition('image.style.large');
diff --git a/core/modules/config/tests/config_schema_test/config/schema/config_schema_test.schema.yml b/core/modules/config/tests/config_schema_test/config/schema/config_schema_test.schema.yml
index ce13363..34c6089 100644
--- a/core/modules/config/tests/config_schema_test/config/schema/config_schema_test.schema.yml
+++ b/core/modules/config/tests/config_schema_test/config/schema/config_schema_test.schema.yml
@@ -142,7 +142,7 @@ config_schema_test.ignore:
       label: 'Label'
     irrelevant:
       type: ignore
-      label: 'Ignore'
+      label: 'Irrelevant'
     indescribable:
       type: ignore
       label: 'Indescribable'