diff --git a/cpp/include/cudf/detail/aggregation/aggregation.cuh b/cpp/include/cudf/detail/aggregation/aggregation.cuh
index b9866e72e75..3ed887e1269 100644
--- a/cpp/include/cudf/detail/aggregation/aggregation.cuh
+++ b/cpp/include/cudf/detail/aggregation/aggregation.cuh
@@ -26,7 +26,6 @@
 
 #include <rmm/cuda_stream_view.hpp>
 #include <rmm/exec_policy.hpp>
-#include "cudf/utilities/type_dispatcher.hpp"
 
 namespace cudf {
 namespace detail {
diff --git a/cpp/tests/groupby/group_count_test.cpp b/cpp/tests/groupby/group_count_test.cpp
index 69be50d18c8..d23f26bc6e2 100644
--- a/cpp/tests/groupby/group_count_test.cpp
+++ b/cpp/tests/groupby/group_count_test.cpp
@@ -240,6 +240,7 @@ TYPED_TEST(FixedPointTestBothReps, GroupBySumProductMinMaxDecimalAsValue)
       test_single_agg(keys, vals, expect_keys, {}, std::move(agg4), force_use_sort_impl::YES),
       cudf::logic_error);
 
+    // commented out until we drop support for CUDA 10.2
     // group_by hash tests
 
     // auto agg5 = cudf::make_sum_aggregation();