diff --git a/tests/mcp/test_tool_write_note.py b/tests/mcp/test_tool_write_note.py
index 0b06684a..40db9387 100644
--- a/tests/mcp/test_tool_write_note.py
+++ b/tests/mcp/test_tool_write_note.py
@@ -495,6 +495,7 @@ async def test_write_note_single_line_inline_fence_is_body_issue_972(app, test_p
     )
 
     content = await read_note("meetings/meeting-notes", project=test_project.name)
+    assert isinstance(content, str)
 
     # The literal one-line string survives verbatim in the body...
     assert one_line in content