diff --git a/tests/foo/1.0/IFoo.hal b/tests/foo/1.0/IFoo.hal
index f54994f..4c54427 100644
--- a/tests/foo/1.0/IFoo.hal
+++ b/tests/foo/1.0/IFoo.hal
@@ -122,7 +122,14 @@
     };
 
     struct WithFmq {
-        fmq_sync<uint8_t> descSync;
+        struct ScatterGather {
+            fmq_sync<uint8_t> descSync;
+        } scatterGathered;
+
+        struct ContainsPointer {
+            fmq_sync<uint8_t> descSync;
+            interface foo;
+        } containsPointer;
     };
 
     enum Discriminator : uint8_t {