diff --git a/test/unit/main.cpp b/test/unit/main.cpp
index b5c91e8..bae689d 100644
--- a/test/unit/main.cpp
+++ b/test/unit/main.cpp
@@ -24,6 +24,24 @@ System.print("my_sum = %(my_sum) (expected: 19)")
 var my_sub = Maths.sub(Maths.sub(8, 5), Maths.sub(20, 19)) + 1
 System.print("my_sub = %(my_sub) (expected: 3)")
 
+)script";
+
+	const constexpr char g_script_2[] = ""
+R"script(class Maths {
+	foreign static mul(a,b)
+	foreign static div(a,b)
+	foreign static sum(a,b)
+	foreign static sub(a,b)
+}
+
+var my_mul_2 = Maths.mul(Maths.mul(2, 2), Maths.mul(3, 2)) - 4
+System.print("my_mul_2 = %(my_mul_2) (expected: 20)")
+
+var my_sum_2 = Maths.sum(Maths.sum(3, 4), Maths.sum(5, -1)) + 8
+System.print("my_sum_2 = %(my_sum_2) (expected: 19)")
+
+var my_sub_2 = Maths.sub(Maths.sub(8, 5), Maths.sub(20, 19)) + 1
+System.print("my_sub_2 = %(my_sub_2) (expected: 3)")
 )script";
 
 class MyConfig : public wren::DefConfiguration {
@@ -89,6 +107,18 @@ int main() {
 
 	wren::VM vm(&config, nullptr);
 	vm.interpret("main", g_script);
+	wren::variable_ensure_slot(vm, {"main", "my_mul"}, 0);
+
+	std::cout << "Dynafunc mem usage: " << vm.dynafunc_byte_size() << " bytes\n";
+
+	vm.reset(&config);
+	std::cout << "Dynafunc mem usage after reset: " << vm.dynafunc_byte_size() << " bytes\n";
+	vm.interpret("main", g_script_2);
+
+	{
+		auto [var] = wren::variables<int>(vm, wren::ModuleAndName{"main", "my_mul_2"});
+		std::cout << "main::my_mul2 == " << var << " (expected: 20)\n";
+	}
 
 	std::cout << "Dynafunc mem usage: " << vm.dynafunc_byte_size() << " bytes\n";
 	return 0;