diff --git a/firmware/controllers/lua/lua_hooks.cpp b/firmware/controllers/lua/lua_hooks.cpp
index 9c33fb70e5..fb3718050c 100644
--- a/firmware/controllers/lua/lua_hooks.cpp
+++ b/firmware/controllers/lua/lua_hooks.cpp
@@ -470,6 +470,8 @@ void configureRusefiLuaHooks(lua_State* l) {
 	lua_register(l, "table3d", lua_table3d);
 	lua_register(l, "curve", lua_curve2d);
 	lua_register(l, "findCurveIndex", lua_findCurveIndex);
+	// used by unit tests
+	lua_register(l, "txCan", lua_txCan);
 
 #if !EFI_UNIT_TEST
 	lua_register(l, "startPwm", lua_startPwm);
@@ -500,7 +502,6 @@ void configureRusefiLuaHooks(lua_State* l) {
 		return 1;
 	});
 
-	lua_register(l, "txCan", lua_txCan);
 #if EFI_CAN_SUPPORT
 	lua_register(l, "canRxAdd", [](lua_State* l) {
 		auto eid = luaL_checkinteger(l, 1);