diff --git a/test-suite/tests/flatten-0021-out.jsonld b/test-suite/tests/flatten-0021-out.jsonld
index 151661123..1b9868be1 100644
--- a/test-suite/tests/flatten-0021-out.jsonld
+++ b/test-suite/tests/flatten-0021-out.jsonld
@@ -7,9 +7,6 @@
             }
         ],
         "@graph": [
-            {
-                "@id": "_:b1"
-            },
             {
                 "@id": "http://example.org/test#book",
                 "http://example.org/vocab#contains": [
@@ -28,9 +25,6 @@
                     }
                 ]
             },
-            {
-                "@id": "http://example.org/test#chapter"
-            },
             {
                 "@id": "http://example.org/test#jane",
                 "http://example.org/vocab#authored": [