diff --git a/csaf_2.1/prose/edit/src/tests-02-optional.md b/csaf_2.1/prose/edit/src/tests-02-optional.md
index 3f25b64c..6b68dc1d 100644
--- a/csaf_2.1/prose/edit/src/tests-02-optional.md
+++ b/csaf_2.1/prose/edit/src/tests-02-optional.md
@@ -399,6 +399,11 @@ The relevant path for this test is:
   "document": {
     "category": "csaf_base",
     "csaf_version": "2.1",
+    "distribution": {
+      "tlp": {
+        "label": "CLEAR"
+      }
+    },
     "publisher": {
       // ...
     },