diff --git a/unit_tests/tests/ignition_injection/injection_mode_transition.cpp b/unit_tests/tests/ignition_injection/injection_mode_transition.cpp
index 130fd85521..221c8f7f67 100644
--- a/unit_tests/tests/ignition_injection/injection_mode_transition.cpp
+++ b/unit_tests/tests/ignition_injection/injection_mode_transition.cpp
@@ -22,7 +22,15 @@ TEST(fuelControl, transitionIssue1592) {
 	ASSERT_EQ(IM_SIMULTANEOUS, ENGINE(getCurrentInjectionMode(PASS_ENGINE_PARAMETER_SIGNATURE)));
 
 
-	eth.fireTriggerEvents2(4 /* count */ , 150 /* ms */);
+	eth.fireRise(150);
+	eth.fireFall(150);
+
+	eth.fireRise(150);
+	eth.fireFall(150);
+
+	eth.fireRise(150);
+	eth.fireFall(150);
+
 	ASSERT_EQ( 400,  GET_RPM()) << "running-RPM#1";
 
 	ASSERT_EQ(IM_SIMULTANEOUS, ENGINE(getCurrentInjectionMode(PASS_ENGINE_PARAMETER_SIGNATURE)));