diff --git a/tests/drupal8/config/schema/test.sequences.schema.yml b/tests/drupal8/config/schema/test.sequences.schema.yml
index bc0fce3..db91a95 100644
--- a/tests/drupal8/config/schema/test.sequences.schema.yml
+++ b/tests/drupal8/config/schema/test.sequences.schema.yml
@@ -14,11 +14,11 @@ sequence_of_sequence:
     type: sequence
     sequence:
       type: mapping
-        mapping:
-          id:
-            type: integer
-          description:
-            type: text
+      mapping:
+        id:
+          type: integer
+        description:
+          type: text
 bc_sequence:
   type: sequence
   sequence: