diff --git a/src/taskgraph/decision.py b/src/taskgraph/decision.py
index a27eda672..7d927ecd8 100644
--- a/src/taskgraph/decision.py
+++ b/src/taskgraph/decision.py
@@ -17,7 +17,6 @@
 from taskgraph.create import create_tasks
 from taskgraph.generator import TaskGraphGenerator
 from taskgraph.parameters import Parameters, get_version
-from taskgraph.taskgraph import TaskGraph
 from taskgraph.util import json
 from taskgraph.util.python_path import find_object
 from taskgraph.util.schema import Schema, validate_schema
@@ -131,9 +130,6 @@ def taskgraph_decision(options, parameters=None):
         "runnable-jobs.json", full_task_graph_to_runnable_tasks(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", list(tgg.target_task_set.tasks.keys()))