diff --git a/swh/model/hypothesis_strategies.py b/swh/model/hypothesis_strategies.py
--- a/swh/model/hypothesis_strategies.py
+++ b/swh/model/hypothesis_strategies.py
@@ -160,6 +160,7 @@
         status=sampled_from(["ongoing", "full", "partial"]),
         type=pgsql_text(),
         snapshot=optional(sha1_git()),
+        metadata=none(),
     )