diff --git a/.changeset/available-actions-non-guaranteed.md b/.changeset/available-actions-non-guaranteed.md
index 7978d2de15..16f8a7915b 100644
--- a/.changeset/available-actions-non-guaranteed.md
+++ b/.changeset/available-actions-non-guaranteed.md
@@ -1,4 +1,5 @@
 ---
+"adcontextprotocol": patch
 ---
 
 compliance(media-buy): the `available_actions` scenario uses a non-guaranteed product fixture so `sales-non-guaranteed`-only sellers can run it.
diff --git a/static/compliance/source/protocols/media-buy/scenarios/available_actions.yaml b/static/compliance/source/protocols/media-buy/scenarios/available_actions.yaml
index 3098c942d6..9ef2e5cbf5 100644
--- a/static/compliance/source/protocols/media-buy/scenarios/available_actions.yaml
+++ b/static/compliance/source/protocols/media-buy/scenarios/available_actions.yaml
@@ -66,7 +66,8 @@ fixtures:
       # sellers (a guaranteed-only fixture made create_buy_from_product fail with
       # DELIVERY_MODE_NOT_SUPPORTED, cascading the whole available-actions flow).
       # The allowed_actions below — what this scenario actually grades — are
-      # delivery-type-agnostic. Mirrors the base media-buy flow fix.
+      # delivery-type-agnostic. Keep this fixture non-guaranteed when extending
+      # the scenario; it mirrors the base media-buy flow compatibility fix.
       delivery_type: "non_guaranteed"
       channels: ["display"]
       format_ids: