diff --git a/src/lifeblood_testing_common/nodes_common.py b/src/lifeblood_testing_common/nodes_common.py
index bde337d6..1b4ca963 100644
--- a/src/lifeblood_testing_common/nodes_common.py
+++ b/src/lifeblood_testing_common/nodes_common.py
@@ -222,7 +222,7 @@ async def _helper_test_worker_node(self,
 
         """
         purge_db()
-        with mock.patch('lifeblood.scheduler.scheduler.Pinger') as ppatch, \
+        with mock.patch('lifeblood.scheduler.scheduler_core.Pinger') as ppatch, \
              mock.patch('lifeblood.worker.Worker.scheduler_pinger') as wppatch:
 
             ppatch.return_value = mock.AsyncMock(Pinger)