diff --git a/unit_tests/tests/lua/test_lua_vag.cpp b/unit_tests/tests/lua/test_lua_vag.cpp
new file mode 100644
index 0000000000..ec465b6ac3
--- /dev/null
+++ b/unit_tests/tests/lua/test_lua_vag.cpp
@@ -0,0 +1,19 @@
+#include "pch.h"
+#include "rusefi_lua.h"
+
+#define VAG_CHECKSUM "function xorChecksum(data)        \
+		return data[1] ~ data[2] ~ data[3] ~ data[4] ~ data[5] ~ data[6] ~ data[7]  \
+	end"
+
+
+TEST(LuaVag, Checksum) {
+	const char* realdata = VAG_CHECKSUM R"(
+
+	function testFunc()
+		data = { 0xE0, 0x20, 0x20, 0x7E, 0xFE, 0xFF, 0xFF, 0x60 }
+		return  xorChecksum(data)
+	end
+	)";
+
+    EXPECT_NEAR_M3(testLuaReturnsNumberOrNil(realdata).value_or(0), 0x60);
+}
diff --git a/unit_tests/tests/tests.mk b/unit_tests/tests/tests.mk
index c4c1b8e851..c08f55a29a 100644
--- a/unit_tests/tests/tests.mk
+++ b/unit_tests/tests/tests.mk
@@ -31,6 +31,7 @@ TESTS_SRC_CPP = \
 	tests/lua/test_lua_basic.cpp \
 	tests/lua/test_lookup.cpp \
 	tests/lua/test_lua_e65.cpp \
+	tests/lua/test_lua_vag.cpp \
 	tests/lua/test_lua_with_engine.cpp \
 	tests/lua/test_lua_hooks.cpp \
 	tests/sensor/test_cj125.cpp \