diff --git a/tests/applications/sharepoint_renamer/test_handler.py b/tests/applications/sharepoint_renamer/test_handler.py
index f5136c31e..08a5d4144 100644
--- a/tests/applications/sharepoint_renamer/test_handler.py
+++ b/tests/applications/sharepoint_renamer/test_handler.py
@@ -163,9 +163,7 @@ def _property_subtasks(harness: Harness, result: Any) -> list[SubTask]:
     the decorator creates for the run itself."""
     wrapper = _subtask_id(result)
     return [
-        s
-        for s in harness.subtasks.list_by_task(_task_id(result))
-        if s.id != wrapper
+        s for s in harness.subtasks.list_by_task(_task_id(result)) if s.id != wrapper
     ]
 
 
@@ -349,9 +347,7 @@ def test_run_completes_with_rejected_files_and_missing_folders_listed(
     productive run red — the failures are the record (ADR-0060)."""
     # Arrange
     sharepoint = FakeSharepoint(
-        _one_property_site(
-            _file("Locked.pdf", "id-1"), _file("Survey.pdf", "id-2")
-        ),
+        _one_property_site(_file("Locked.pdf", "id-1"), _file("Survey.pdf", "id-2")),
         reject={"id-1": PermissionError("locked by another user")},
     )
     _install(
@@ -387,6 +383,35 @@ def test_run_completes_with_rejected_files_and_missing_folders_listed(
     }
 
 
+def test_property_whose_file_was_rejected_completes_rather_than_failing(
+    harness: Harness, tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """A failed child would turn the whole Task red — any failed sub_task does.
+    A locked file must be recorded on a *completed* property instead."""
+    # Arrange
+    sharepoint = FakeSharepoint(
+        _one_property_site(_file("Locked.pdf", "id-1"), _file("Survey.pdf", "id-2")),
+        reject={"id-1": PermissionError("locked by another user")},
+    )
+    _install(monkeypatch, tmp_path, sharepoint)
+
+    # Act
+    result = _handler(harness)(_sqs_event({"sharepoint_site": SITE}), None)
+
+    # Assert
+    child = _property_subtasks(harness, result)[0]
+    assert child.status is SubTaskStatus.COMPLETE
+    assert (child.outputs or {})["result"]["failed"] == [
+        {
+            "uprn": UPRN,
+            "original_name": "Locked.pdf",
+            "new_name": f"{UPRN}_{ADDRESS} {POSTCODE}_Locked.pdf",
+            "error": "locked by another user",
+        }
+    ]
+    assert harness.tasks.get(_task_id(result)).status is TaskStatus.COMPLETE
+
+
 # ---------------------------------------------------------------------------
 # An unusable site is rejected before anything is touched
 # ---------------------------------------------------------------------------
@@ -426,5 +451,7 @@ def test_unrecognised_site_fails_the_run(
     # Assert
     subtask = harness.subtasks.get(_subtask_id(result))
     assert subtask.status is SubTaskStatus.FAILED
-    assert "Unrecognised SharePoint site 'NOT_A_SITE'" in (subtask.outputs or {})["error"]
+    assert (
+        "Unrecognised SharePoint site 'NOT_A_SITE'" in (subtask.outputs or {})["error"]
+    )
     assert sharepoint.renamed == []