diff --git a/unit_tests/engine_test_helper.cpp b/unit_tests/engine_test_helper.cpp
index a4da8f3851..200ae3be5b 100644
--- a/unit_tests/engine_test_helper.cpp
+++ b/unit_tests/engine_test_helper.cpp
@@ -80,12 +80,17 @@ void EngineTestHelper::firePrimaryTriggerFall() {
 	engine.triggerCentral.handleShaftSignal(SHAFT_PRIMARY_FALLING, &engine, engine.engineConfiguration, &persistentConfig, boardConfiguration);
 }
 
+void EngineTestHelper::fireTriggerEventsWithDuration(int durationMs) {
+	fireTriggerEvents2(1, durationMs);
+}
+
 /**
  * Sends specified number of rise/fall trigger events, with specified amount of time between those.
  *
  * This is helpful for TT_ONE trigger wheel decoder and probably other decoders as well.
  */
-void EngineTestHelper::fireTriggerEvents2(int count, int durationUs) {
+void EngineTestHelper::fireTriggerEvents2(int count, int durationMs) {
+	int durationUs = MS2US(durationMs);
 	for (int i = 0; i < count; i++) {
 		timeNowUs += durationUs;
 		firePrimaryTriggerRise();
@@ -101,7 +106,7 @@ void EngineTestHelper::clearQueue() {
 }
 
 void EngineTestHelper::fireTriggerEvents(int count) {
-	fireTriggerEvents2(count, MS2US(5)); // 5ms
+	fireTriggerEvents2(count, 5); // 5ms
 }
 
 void EngineTestHelper::applyTriggerShape() {
diff --git a/unit_tests/engine_test_helper.h b/unit_tests/engine_test_helper.h
index a85243a2a8..07cd482b4a 100644
--- a/unit_tests/engine_test_helper.h
+++ b/unit_tests/engine_test_helper.h
@@ -23,7 +23,8 @@ public:
 	void firePrimaryTriggerRise();
 	void firePrimaryTriggerFall();
 	void fireTriggerEvents(int count);
-	void fireTriggerEvents2(int count, int durationUs);
+	void fireTriggerEventsWithDuration(int durationMs);
+	void fireTriggerEvents2(int count, int durationMs);
 	void clearQueue();
 
 	Engine engine;
diff --git a/unit_tests/test_fasterEngineSpinningUp.cpp b/unit_tests/test_fasterEngineSpinningUp.cpp
index aa5a802c3c..f5f5e52441 100644
--- a/unit_tests/test_fasterEngineSpinningUp.cpp
+++ b/unit_tests/test_fasterEngineSpinningUp.cpp
@@ -89,7 +89,7 @@ void testFasterEngineSpinningUp() {
 
 	eth.clearQueue();
 	timeStartUs = timeNowUs;
-	eth.fireTriggerEvents2(1, MS2US(60));
+	eth.fireTriggerEvents2(1, 60);
 
 	// check if the mode is now changed to 'running' at higher RPM
 	assertEquals(RUNNING, engine->rpmCalculator.getState());
diff --git a/unit_tests/test_startOfCrankingPrimingPulse.cpp b/unit_tests/test_startOfCrankingPrimingPulse.cpp
index 0759170c0f..186acb24b1 100644
--- a/unit_tests/test_startOfCrankingPrimingPulse.cpp
+++ b/unit_tests/test_startOfCrankingPrimingPulse.cpp
@@ -24,7 +24,7 @@ void testPlainCrankingWithoutAdvancedFeatures() {
 	setupSimpleTestEngineWithMafAndTT_ONE_trigger(&eth);
 	assertEqualsM("RPM=0", 0, engine->rpmCalculator.getRpm(PASS_ENGINE_PARAMETER_SIGNATURE));
 
-	eth.fireTriggerEvents2(1, MS2US(200));
+	eth.fireTriggerEvents2(1, 200);
 	// still no RPM since need to cycles measure cycle duration
 	assertEqualsM("RPM#1", 0, engine->rpmCalculator.getRpm(PASS_ENGINE_PARAMETER_SIGNATURE));
 
diff --git a/unit_tests/test_trigger_decoder.cpp b/unit_tests/test_trigger_decoder.cpp
index 9e657461bc..fea316d08f 100644
--- a/unit_tests/test_trigger_decoder.cpp
+++ b/unit_tests/test_trigger_decoder.cpp
@@ -666,10 +666,10 @@ static void setTestBug299(EngineTestHelper *eth) {
 	assertRpm("RPM=0", 0 PASS_ENGINE_PARAMETER_SUFFIX);
 	assertEqualsM("setTestBug299 EL", 0, getEngineLoadT(PASS_ENGINE_PARAMETER_SIGNATURE));
 	assertEqualsM("setTestBug299 IAT", 30, engine->sensors.iat);
-	eth->fireTriggerEvents2(1, MS2US(20));
+	eth->fireTriggerEvents2(1, 20);
 	// still no RPM since need to cycles measure cycle duration
 	assertRpm("setTestBug299: RPM#1", 0 PASS_ENGINE_PARAMETER_SUFFIX);
-	eth->fireTriggerEvents2(1, MS2US(20));
+	eth->fireTriggerEvents2(1, 20);
 	assertRpm("setTestBug299: RPM#2", 3000 PASS_ENGINE_PARAMETER_SUFFIX);
 
 	eth->clearQueue();