diff --git a/unit_tests/engine_test_helper.cpp b/unit_tests/engine_test_helper.cpp
index 462c36d109..25ac6cf947 100644
--- a/unit_tests/engine_test_helper.cpp
+++ b/unit_tests/engine_test_helper.cpp
@@ -21,7 +21,7 @@ extern WaveChart waveChart;
 #endif /* EFI_ENGINE_SNIFFER */
 
 extern WarningCodeState unitTestWarningCodeState;
-extern engine_configuration_s & activeConfiguration;
+extern engine_configuration_s activeConfiguration;
 extern bool printTriggerDebug;
 extern bool printTriggerTrace;
 extern bool printFuelDebug;
diff --git a/unit_tests/tests/test_change_engine_type.cpp b/unit_tests/tests/test_change_engine_type.cpp
index f93b191b79..5f4f1f6ff8 100644
--- a/unit_tests/tests/test_change_engine_type.cpp
+++ b/unit_tests/tests/test_change_engine_type.cpp
@@ -7,8 +7,6 @@
 
 #include "pch.h"
 
-extern engine_configuration_s & activeConfiguration;
-
 TEST(misc, changeEngineType) {
 	/**
 	 * this configuration has triggerInputDebugPins defined