diff --git a/firmware/controllers/lua/lua_hooks.cpp b/firmware/controllers/lua/lua_hooks.cpp
index cf6f35694a..8073a3beea 100644
--- a/firmware/controllers/lua/lua_hooks.cpp
+++ b/firmware/controllers/lua/lua_hooks.cpp
@@ -16,6 +16,10 @@ using namespace luaaa;
 // Some functions lean on existing FSIO implementation
 #include "fsio_impl.h"
 
+#if EFI_UNIT_TEST
+Engine *engineForLuaUnitTests;
+#endif
+
 static int lua_readpin(lua_State* l) {
 	auto msg = luaL_checkstring(l, 1);
 #if EFI_PROD_CODE
@@ -91,6 +95,21 @@ static int lua_table3d(lua_State* l) {
 	return 1;
 }
 
+static int lua_curve2d(lua_State* l) {
+	auto curveIdx = luaL_checkinteger(l, 1);
+	auto x = luaL_checknumber(l, 2);
+
+#if EFI_UNIT_TEST
+	Engine *engine = engineForLuaUnitTests;
+	EXPAND_Engine;
+#endif
+
+	auto result = getCurveValue(curveIdx, x PASS_ENGINE_PARAMETER_SUFFIX);
+
+	lua_pushnumber(l, result);
+	return 1;
+}
+
 static int lua_txCan(lua_State* l) {
 	auto channel = luaL_checkinteger(l, 1);
 	// TODO: support multiple channels
@@ -390,6 +409,7 @@ void configureRusefiLuaHooks(lua_State* l) {
 	lua_register(l, "getSensorRaw", lua_getSensorRaw);
 	lua_register(l, "hasSensor", lua_hasSensor);
 	lua_register(l, "table3d", lua_table3d);
+	lua_register(l, "curve", lua_curve2d);
 	lua_register(l, "txCan", lua_txCan);
 
 #if !EFI_UNIT_TEST
diff --git a/unit_tests/engine_test_helper.cpp b/unit_tests/engine_test_helper.cpp
index 4efeb796ad..be9822a49d 100644
--- a/unit_tests/engine_test_helper.cpp
+++ b/unit_tests/engine_test_helper.cpp
@@ -29,6 +29,7 @@ extern bool printTriggerDebug;
 extern bool printTriggerTrace;
 extern bool printFuelDebug;
 extern int minCrankingRpm;
+extern Engine *engineForLuaUnitTests;
 
 EngineTestHelperBase::EngineTestHelperBase() { 
 	// todo: make this not a global variable, we need currentTimeProvider interface on engine
@@ -58,6 +59,8 @@ EngineTestHelper::EngineTestHelper(engine_type_e engineType, configuration_callb
 	engine->setConfig(engine, &persistentConfig.engineConfiguration, &persistentConfig);
 	EXPAND_Engine;
 
+	engineForLuaUnitTests = engine;
+
 	Sensor::setMockValue(SensorType::Clt, 70);
 	Sensor::setMockValue(SensorType::Iat, 30);