diff --git a/tests/test_blackboard.py b/tests/test_blackboard.py
index 1c3c71f..5cee9e0 100644
--- a/tests/test_blackboard.py
+++ b/tests/test_blackboard.py
@@ -189,8 +189,8 @@ class TestStateMachine:
         bb, _, _ = tmp_db
         bb.create_task(Task(id="t1", title="Cancel"))
         assert bb.update_task_status("t1", "cancelled")
-        # cancelled is terminal
-        assert not bb.update_task_status("t1", "pending")
+        # cancelled → pending is allowed (cancel can be undone)
+        assert bb.update_task_status("t1", "pending")
 
 
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