--- a/taskcluster/taskgraph/decision.py
+++ b/taskcluster/taskgraph/decision.py
@@ -117,16 +117,17 @@ def taskgraph_decision(options, paramete
     full_task_json = tgg.full_task_graph.to_json()
     write_artifact('full-task-graph.json', full_task_json)
 
     # this is just a test to check whether the from_json() function is working
     _, _ = TaskGraph.from_json(full_task_json)
 
     # write out the target task set to allow reproducing this as input
     write_artifact('target-tasks.json', tgg.target_task_set.tasks.keys())
+    write_artifact('target-task-graph.json', tgg.target_task_graph.to_json())
 
     # write out the optimized task graph to describe what will actually happen,
     # and the map of labels to taskids
     write_artifact('task-graph.json', tgg.morphed_task_graph.to_json())
     write_artifact('label-to-taskid.json', tgg.label_to_taskid)
 
     # actually create the graph
     create_tasks(tgg.morphed_task_graph, tgg.label_to_taskid, parameters)