diff --git a/core/modules/migrate_drupal/src/Tests/d6/MigrateConfigSchemaBase.php b/core/modules/migrate_drupal/src/Tests/d6/MigrateConfigSchemaBase.php
index b8f31aa..7af563f 100644
--- a/core/modules/migrate_drupal/src/Tests/d6/MigrateConfigSchemaBase.php
+++ b/core/modules/migrate_drupal/src/Tests/d6/MigrateConfigSchemaBase.php
@@ -62,7 +62,8 @@ public function assertConfigSchema(TypedConfigManagerInterface $typed_config, $c
       return;
     }
     $definition = $typed_config->getDefinition($config_name);
-    $this->schema = $typed_config->create($definition, $config_data);
+    $data_definition = $typed_config->buildDataDefinition($definition, $config_data);
+    $this->schema = $typed_config->create($data_definition, $config_data);
     $this->configPass = TRUE;
     foreach ($config_data as $key => $value) {
       $this->checkValue($key, $value);