diff --git a/tests/test/wasm/twasmexternref4f.pp b/tests/test/wasm/twasmexternref4f.pp
new file mode 100644
index 0000000000..8246a2affd
--- /dev/null
+++ b/tests/test/wasm/twasmexternref4f.pp
@@ -0,0 +1,21 @@
+{ %cpu=wasm32 }
+{ %fail }
+
+program twasmexternref4f;
+
+{$MODE objfpc}
+
+procedure testproc(out p);
+begin
+end;
+
+procedure testproc2;
+var
+  q: WasmExternRef;
+begin
+  { WasmExternRef cannot be passed as an untyped out parameter }
+  testproc(q);
+end;
+
+begin
+end.