diff --git a/unit_tests/engine_test_helper.cpp b/unit_tests/engine_test_helper.cpp
index e7c5e20f41..bfc50e45b1 100644
--- a/unit_tests/engine_test_helper.cpp
+++ b/unit_tests/engine_test_helper.cpp
@@ -73,7 +73,7 @@ EngineTestHelper::EngineTestHelper(engine_type_e engineType) : engine (&persiste
 	engine->periodicSlowCallback(PASS_ENGINE_PARAMETER_SIGNATURE);
 
 	engine->initializeTriggerShape(NULL PASS_ENGINE_PARAMETER_SUFFIX);
-	engine->triggerCentral.addEventListener(rpmShaftPositionCallback, "rpm reporter", engine);
+	initRpmCalculator(NULL PASS_ENGINE_PARAMETER_SUFFIX);
 	engine->triggerCentral.addEventListener(mainTriggerCallback, "main loop", engine);
 }