diff --git a/tests/baz/1.0/IBaz.hal b/tests/baz/1.0/IBaz.hal
index 4cb9689..c8fe2b6 100644
--- a/tests/baz/1.0/IBaz.hal
+++ b/tests/baz/1.0/IBaz.hal
@@ -34,6 +34,12 @@
         blah = goober
     };
 
+    typedef int32_t[3] ThreeInts;
+    struct T {
+        ThreeInts[5]  matrix5x3;
+        int32_t[3][5] matrix3x5;
+    };
+
     @Fragile @NoReally(very="yes", array={"a","b","c"})
     oneway doThis(float param);