only in patch2:
unchanged:
--- a/core/tests/Drupal/KernelTests/Core/Entity/ConfigEntityQueryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/ConfigEntityQueryTest.php
@@ -565,6 +565,11 @@ public function testDotted() {
       ->condition('array.level1.level2', 3)
       ->execute();
     $this->assertResults(['5']);
+    // Test dotted sorting.
+    $this->queryResults = $this->factory->get('config_query_test')
+      ->sort('array.level1.level2', 'DESC')
+      ->execute();
+    $this->assertResults(['5', '2', '4', '1', '3']);
     // Make sure that values on the wildcard level do not match if there are
     // sub-keys defined. This must not find anything even if entity 2 has a
     // top-level key number with value 41.