diff --git a/src/vt/topos/mapping/dense/dense.impl.h b/src/vt/topos/mapping/dense/dense.impl.h
index 2d6d83b8c1..8c553ade18 100644
--- a/src/vt/topos/mapping/dense/dense.impl.h
+++ b/src/vt/topos/mapping/dense/dense.impl.h
@@ -93,6 +93,13 @@ NodeType dense3DRoundRobinMap(Idx3DPtr<T> idx, Idx3DPtr<T> max, NodeType nx) {
   return lin_idx % nx;
 }
 
+template <typename T, int8_t N>
+NodeType denseNDRoundRobinMap(IdxNDPtr<T,N> idx, IdxNDPtr<T,N> max, NodeType nx) {
+  using IndexElmType = typename IdxTypeND<T, N>::DenseIndexType;
+  auto const& lin_idx = linearizeDenseIndexColMajor<IndexElmType, N>(idx, max);
+  return lin_idx % nx;
+}
+
 // Default block mappings
 template <typename T>
 NodeType dense1DBlockMap(Idx1DPtr<T> idx, Idx1DPtr<T> max, NodeType nx) {
diff --git a/tests/unit/collection/test_collection_construct_common.h b/tests/unit/collection/test_collection_construct_common.h
index a561f03a1b..0b4ce669d9 100644
--- a/tests/unit/collection/test_collection_construct_common.h
+++ b/tests/unit/collection/test_collection_construct_common.h
@@ -122,11 +122,12 @@ void test_construct_1(std::string const& label) {
 
   auto const& this_node = theContext()->getNode();
   if (this_node == 0) {
-    auto const& col_size = 32;
+    // We don't want too many elements for 4 dimensions
+    auto constexpr num_dims = ColType::IndexType::ndims();
+    auto constexpr col_size = 8 / num_dims;
 
-    auto rng = CreateRange<ColType, ColType::IndexType::ndims()>(col_size);
+    auto rng = CreateRange<ColType, num_dims>(col_size);
     auto proxy = ConstructParams<ColType>::construct(label, rng);
-
     proxy.template broadcast<
       MsgType,
       ConstructHandlers::handler<ColType,MsgType>
@@ -138,8 +139,11 @@ template<typename ColType>
 void test_construct_distributed_1() {
   using MsgType   = typename ColType::MsgType;
 
-  auto const& col_size = 32;
-  auto rng = CreateRange<ColType, ColType::IndexType::ndims()>(col_size);
+  // We don't want too many elements for 4 dimensions
+  auto constexpr num_dims = ColType::IndexType::ndims();
+  auto constexpr col_size = 8 / num_dims;
+
+  auto rng = CreateRange<ColType, num_dims>(col_size);
   auto proxy = ConstructParams<ColType>::constructCollective(rng, "test_construct_distributed_1");
   proxy.template broadcast<
     MsgType,
diff --git a/tests/unit/collection/test_construct.cc b/tests/unit/collection/test_construct.cc
index 31d60c9212..35595716cc 100644
--- a/tests/unit/collection/test_construct.cc
+++ b/tests/unit/collection/test_construct.cc
@@ -100,7 +100,7 @@ TEST_F(TestConstructLabel, test_labels) {
   auto const range = Index1D(num_nodes);
   std::string const label = "test_labels";
 
-  auto proxy = makeCollection<default_::TestCol>(label)
+  auto proxy = makeCollection<default_::TestCol1D>(label)
     .bounds(range)
     .bulkInsert()
     .wait();