diff --git a/firmware/controllers/system/efi_gpio.h b/firmware/controllers/system/efi_gpio.h
index 8045df64a7..573755eadb 100644
--- a/firmware/controllers/system/efi_gpio.h
+++ b/firmware/controllers/system/efi_gpio.h
@@ -63,12 +63,17 @@ public:
 #if EFI_GPIO_HARDWARE
 	ioportid_t port = 0;
 	uint8_t pin = 0;
-	#if (BOARD_EXT_GPIOCHIPS > 0)
-		/* used for external pins */
-		brain_pin_e brainPin;
-		bool ext;
-	#endif
 #endif /* EFI_GPIO_HARDWARE */
+
+#if (EFI_GPIO_HARDWARE && (BOARD_EXT_GPIOCHIPS > 0))
+	/* used for external pins */
+	brain_pin_e brainPin;
+	bool ext;
+#elif EFI_SIMULATOR || EFI_UNIT_TEST
+	// used for setMockState
+	brain_pin_e brainPin;
+#endif /* EFI_GPIO_HARDWARE */
+
 	int8_t currentLogicValue = INITIAL_PIN_STATE;
 	/**
 	 * we track current pin status so that we do not touch the actual hardware if we want to write new pin bit
@@ -137,7 +142,7 @@ public:
 class RegisteredOutputPin : public virtual OutputPin {
 public:
 	RegisteredOutputPin(const char *registrationName, short pinOffset, short pinModeOffset);
-	void init();
+	void init(DECLARE_ENGINE_PARAMETER_SIGNATURE);
 	void unregister();
 	RegisteredOutputPin *next;
 private:
diff --git a/unit_tests/engine_test_helper.cpp b/unit_tests/engine_test_helper.cpp
index d7318df14e..dee0d037a3 100644
--- a/unit_tests/engine_test_helper.cpp
+++ b/unit_tests/engine_test_helper.cpp
@@ -52,7 +52,6 @@ EngineTestHelper::EngineTestHelper(engine_type_e engineType, configuration_callb
 
 	unitTestWarningCodeState.clear();
 
-
 	memset(&activeConfiguration, 0, sizeof(activeConfiguration));
 
 	enginePins.reset();
@@ -79,6 +78,8 @@ EngineTestHelper::EngineTestHelper(engine_type_e engineType, configuration_callb
 
 	resetConfigurationExt(NULL, configurationCallback, engineType PASS_ENGINE_PARAMETER_SUFFIX);
 
+	enginePins.startPins(PASS_ENGINE_PARAMETER_SIGNATURE);
+
 	commonInitEngineController(NULL PASS_ENGINE_PARAMETER_SUFFIX);
 
 	engineConfiguration->mafAdcChannel = EFI_ADC_10;