diff --git a/test/example_wasm_files/globals.wat b/test/example_wasm_files/globals.wat
index 94c191b1..efefaade 100644
--- a/test/example_wasm_files/globals.wat
+++ b/test/example_wasm_files/globals.wat
@@ -2,6 +2,8 @@
   (global $meaning_of_life (export "meaning_of_life") i32 (i32.const 42))
   (global (export "count_32") (mut i32) (i32.const -32))
   (global (export "count_64") (mut i64) (i64.const -64))
+  (global (export "externref") externref (ref.null extern))
+  (global (export "funcref") funcref (ref.null func))
   (global (export "bad_pi_32") (mut f32) (f32.const 0))
   (global (export "bad_pi_64") (mut f64) (f64.const 0))
 )
\ No newline at end of file
diff --git a/test/wasmex/instance_test.exs b/test/wasmex/instance_test.exs
index 068007e0..e74d5e1f 100644
--- a/test/wasmex/instance_test.exs
+++ b/test/wasmex/instance_test.exs
@@ -215,6 +215,12 @@ defmodule Wasmex.InstanceTest do
       assert {:ok, 42} = Wasmex.Instance.get_global_value(store, instance, "meaning_of_life")
       assert {:ok, -32} = Wasmex.Instance.get_global_value(store, instance, "count_32")
       assert {:ok, -64} = Wasmex.Instance.get_global_value(store, instance, "count_64")
+
+      assert {:error, "unable_to_return_extern_ref_type"} =
+               Wasmex.Instance.get_global_value(store, instance, "externref")
+
+      assert {:error, "unable_to_return_func_ref_type"} =
+               Wasmex.Instance.get_global_value(store, instance, "funcref")
     end
 
     test t(&Wasmex.Instance.set_global_value/4), context do