diff --git a/lib/exgboost/training.ex b/lib/exgboost/training.ex
index 8c27b44..3c58715 100644
--- a/lib/exgboost/training.ex
+++ b/lib/exgboost/training.ex
@@ -6,6 +6,8 @@ defmodule EXGBoost.Training do
 
   @spec train(DMatrix.t(), Keyword.t()) :: Booster.t()
   def train(%DMatrix{} = dmat, opts \\ []) do
+    dmat_opts = Keyword.take(opts, EXGBoost.Internal.dmatrix_feature_opts())
+
     valid_opts = [
       callbacks: [],
       early_stopping_rounds: nil,
@@ -47,7 +49,7 @@ defmodule EXGBoost.Training do
 
     evals_dmats =
       Enum.map(evals, fn {x, y, name} ->
-        {DMatrix.from_tensor(x, y, format: :dense), name}
+        {DMatrix.from_tensor(x, y, Keyword.put_new(dmat_opts, :format, :dense)), name}
       end)
 
     bst =
@@ -174,7 +176,7 @@ defmodule EXGBoost.Training do
         # XGBoost in the Makefile to dump the config to JSON.
         #
         %{"learner" => %{"metrics" => metrics, "default_metric" => default_metric}} =
-          EXGBoost.dump_config(bst) |> Jason.decode!() |> dbg()
+          EXGBoost.dump_config(bst) |> Jason.decode!()
 
         metric_name =
           cond do