diff --git a/lib/mb_binary_tree/traverse.ex b/lib/mb_binary_tree/traverse.ex
new file mode 100644
index 0000000..97e771a
--- /dev/null
+++ b/lib/mb_binary_tree/traverse.ex
@@ -0,0 +1,5 @@
+defmodule MbBinaryTree.Traverse do
+  @moduledoc """
+  Utility functions for traversing binary trees.
+  """
+end
diff --git a/test/mb_binary_tree/traverse_test.exs b/test/mb_binary_tree/traverse_test.exs
new file mode 100644
index 0000000..6997692
--- /dev/null
+++ b/test/mb_binary_tree/traverse_test.exs
@@ -0,0 +1,4 @@
+defmodule MbBinaryTree.TraverseTest do
+  use ExUnit.Case
+  doctest MbBinaryTree.Traverse
+end