 
   test "validate_config/1 with valid config", %{config: config} do
     assert :ok = config |> Postmark.validate_config()
-    assert :ok = config |> Keyword.put_new(:template, true) |> Postmark.validate_config()
   end
 
   test "validate_config/1 with invalid config" do

  end

  test "delivery/1 with all fields for template alias returns :ok", %{bypass: bypass, config: config} do
    config         = Keyword.merge(config, template: true)
    template_model = %{
      name:    "Tony Stark",
      company: "Avengers",

  end

  test "delivery/1 with all fields for template id returns :ok", %{bypass: bypass, config: config} do
    template_model = %{
      name:    "Tony Stark",
      company: "Avengers",
