diff --git a/include/xo/alloc2/alloc/RAllocator.hpp b/include/xo/alloc2/alloc/RAllocator.hpp
index e2ba55d..12d1a78 100644
--- a/include/xo/alloc2/alloc/RAllocator.hpp
+++ b/include/xo/alloc2/alloc/RAllocator.hpp
@@ -35,6 +35,8 @@ namespace xo {
             size_type    allocated() const noexcept { return O::iface()->allocated(O::data()); }
             bool          contains(const void * p) const noexcept { return O::iface()->contains(O::data(), p); }
             AllocError  last_error() const noexcept { return O::iface()->last_error(O::data()); }
+            AllocInfo   alloc_info(value_type mem) const noexcept { return O::iface()->alloc_info(O::data(), mem); }
+            //range_type alloc_range(DArena & mm)
 
             value_type       alloc(size_type z) noexcept { return O::iface()->alloc(O::data(), z); }
             value_type super_alloc(size_type z) noexcept { return O::iface()->super_alloc(O::data(), z); }
@@ -42,7 +44,6 @@ namespace xo {
                                    bool complete_flag) noexcept { return O::iface()->sub_alloc(O::data(),
                                                                                              z, complete_flag); }
             bool            expand(size_type z) { return O::iface()->expand(O::data(), z); }
-            AllocInfo   alloc_info(value_type mem) { return O::iface()->alloc_info(O::data(), mem); }
 
             static bool _valid;
         };
diff --git a/utest/random_allocs.cpp b/utest/random_allocs.cpp
index c2775a5..b3fb514 100644
--- a/utest/random_allocs.cpp
+++ b/utest/random_allocs.cpp
@@ -4,6 +4,7 @@
  **/
 
 #include "random_allocs.hpp"
+#include "arena/DArena.hpp"
 #include "padding.hpp"
 #include <xo/indentlog/scope.hpp>
 #include <xo/indentlog/print/tag.hpp>
@@ -12,6 +13,8 @@
 
 namespace utest {
     using xo::mm::AllocInfo;
+    using xo::mm::DArena;
+    using xo::mm::ArenaConfig;
     using xo::mm::padding;
     using xo::rng::xoshiro256ss;
     using xo::facet::obj;
@@ -163,6 +166,12 @@ namespace utest {
 
             }
 
+            /** scratch arena for iterators **/
+            DArena scratch_mm = DArena::map(ArenaConfig{.name_ = "scratch",
+                                                        .size_ = 4*1024,
+                                                        .hugepage_z_ = 4*1024 });
+
+
 #ifdef NOT_YET // to verify iteration here, need iterator support in AAllocator
 
             /* verify iteration visits all the allocs, exactly once */