diff --git a/tests/fixtures/info-claim-1477.json b/tests/fixtures/info-claim-1477.json
index 5c8bf46f9e..42dfd38cc9 100644
--- a/tests/fixtures/info-claim-1477.json
+++ b/tests/fixtures/info-claim-1477.json
@@ -1 +1 @@
-{"seq": 1477, "id": "7014fe8b11eb", "from": "refactor-r1", "to": "claude-code", "ts": 1791792601.4385777, "type": "info", "text": "Resource claim admitted", "sender_role": "agent", "notice": true, "claim_transition": {"owner": "refactor-r1", "incarnation": "1790606381.4139948", "seq": 1477, "message_id": "7014fe8b11eb", "claims": ["/home/ts/wt/toad-r1-probe/src/toad/acp/agent_session.py"], "releases": [], "generation": "4a17769ec91c482090e4fb9527ef846b", "admission": {"wire_root_id": "e206f3766e60451a989ca34df0e2a94b", "source_seq": 1476, "source_message_id": "a12955d4462c", "wake_claim_id": "cohort-v1:c44b376b300cb2967b0a6903d9c224a493af491fec53a1351db95bd2ca172007", "wake_revision": 2, "recipient_lookup": "b62198578686a51022b6c6d7b816ee5a", "execution_id": "wirev1e48154b14809122ab701b179a6dedc97ce3ef71851803f15c8af992cd5484623", "operation_id": "b0ec2c30e7af461d1337e8a5f81673f6", "owner_admission_generation": 10918, "turn_id": "37015669515b8854b8c09cb9d94b1972", "participant_generation": 1, "attempt_ordinal": 1, "version": 1}}}
+{"seq": 1477, "id": "7014fe8b11eb", "from": "refactor-r1", "to": "claude-code", "ts": 1791792601.4385777, "type": "info", "text": "Resource claim admitted", "sender_role": "agent", "notice": true, "claim_transition": {"owner": "refactor-r1", "incarnation": "1790606381.4139948", "seq": 1477, "message_id": "7014fe8b11eb", "claims": ["/home/ts/wt/toad-r1-probe/src/toad/acp/agent_session.py"], "releases": [], "generation": "4a17769ec91c482090e4fb9527ef846b", "resource_scope": {"wire_root_id": "e206f3766e60451a989ca34df0e2a94b", "source_seq": 1476, "source_message_id": "a12955d4462c", "wake_claim_id": "cohort-v1:c44b376b300cb2967b0a6903d9c224a493af491fec53a1351db95bd2ca172007", "wake_revision": 2, "recipient_lookup": "b62198578686a51022b6c6d7b816ee5a", "execution_id": "wirev1e48154b14809122ab701b179a6dedc97ce3ef71851803f15c8af992cd5484623", "operation_id": "b0ec2c30e7af461d1337e8a5f81673f6", "turn_id": "37015669515b8854b8c09cb9d94b1972", "participant_generation": 1, "attempt_ordinal": 1, "version": 2, "owner_claimed_generation": 10918}}}
diff --git a/tests/test_historical_views.py b/tests/test_historical_views.py
index 6b2672c44e..46d03164a1 100644
--- a/tests/test_historical_views.py
+++ b/tests/test_historical_views.py
@@ -328,9 +328,9 @@ def test_attach_only_reads_original_roots_and_rejects_changed_snapshot(tmp_path)
         bounds=PageBounds(HistoryCursor(source=source.key, sequence=100).older()),
     )
     archived = Bus(Bus.path_in(Path(source.root)))
-    template = page.messages[0]
-    archived.append(lambda seq, db: PublicRecord.from_message(
-        replace(template, seq=seq, body="external archive mutation")))
+    original = page.messages[0]
+    archived.append(lambda seq, db: PublicRecord.from_message(Message(
+        original.sender, original.target, "external archive mutation", original.type, seq=seq)))
     with pytest.raises(ValueError):
         live.views.mark_page_read(page, worktree=str(live.root))
     with pytest.raises(ValueError):