diff --git a/lib/core/structure/root.ex b/lib/core/structure/root.ex
index f882490..16d72b9 100644
--- a/lib/core/structure/root.ex
+++ b/lib/core/structure/root.ex
@@ -24,9 +24,14 @@ defmodule Structure.Root do
         "{app_snake}/resources/cloud/Dockerfile-build" => @base <> "Dockerfile-build.txt",
         "{app_snake}/test/infrastructure/entry_points/api_rest_test.exs" =>
           @base <> "api_rest_test.exs",
+        "{app_snake}/test/infrastructure/entry_points/health_check_test.exs" =>
+          @base <> "health_check_test.exs",
         "{app_snake}/test/{app_snake}_application_test.exs" => @base <> "test_application.exs",
         "{app_snake}/test/test_helper.exs" => @base <> "test_helper.exs",
-        "{app_snake}/coveralls.json" => @base <> "coveralls.json"
+        "{app_snake}/coveralls.json" => @base <> "coveralls.json",
+        "{app_snake}/test/utils/custom_telemetry_test.exs" =>
+          @base <> "custom_telemetry_test.exs",
+        "{app_snake}/test/utils/data_type_utils_test.exs" => @base <> "data_type_utils_test.exs"
       },
       folders: [
         "{app_snake}/lib/infrastructure/driven_adapters/",
diff --git a/priv/templates/structure/api_rest.ex b/priv/templates/structure/api_rest.ex
index 998a296..2d01b2c 100644
--- a/priv/templates/structure/api_rest.ex
+++ b/priv/templates/structure/api_rest.ex
@@ -1,5 +1,5 @@
 defmodule {app}.Infrastructure.EntryPoint.ApiRest do
-
+  @compile if Mix.env() == :test, do: :export_all
   @moduledoc """
   Access point to the rest exposed services
   """
diff --git a/priv/templates/structure/api_rest_test.exs b/priv/templates/structure/api_rest_test.exs
index dee1bd7..1007151 100644
--- a/priv/templates/structure/api_rest_test.exs
+++ b/priv/templates/structure/api_rest_test.exs
@@ -13,7 +13,8 @@ defmodule {app}.Infrastructure.EntryPoint.ApiRestTets do
       |> ApiRest.call(@opts)
 
     assert conn.state == :sent
-    assert conn.status in [200, 500] # TODO: Implement mocks correctly when needed
+    # TODO: Implement mocks correctly when needed
+    assert conn.status in [200, 500]
   end
 
   test "test Hello" do
@@ -26,4 +27,56 @@ defmodule {app}.Infrastructure.EntryPoint.ApiRestTets do
     assert conn.status == 200
   end
 
+  test "put_resp_content_type/2" do
+    conn = conn(:get, "/test_content_type")
+    conn = put_resp_content_type(conn, "application/json")
+
+    assert get_resp_header(conn, "content-type") == ["application/json; charset=utf-8"]
+  end
+
+  test "test non-existent endpoint" do
+    conn =
+      :get
+      |> conn("/api/nonexistent", "")
+      |> ApiRest.call(@opts)
+
+    assert conn.state == :sent
+    assert conn.status == 404
+  end
+
+  test "test POST on /api/health" do
+    conn =
+      :post
+      |> conn("/api/health", "")
+      |> ApiRest.call(@opts)
+
+    assert conn.state == :sent
+    assert conn.status in [200, 500]
+  end
+
+  describe "handle_not_found/2" do
+    test "returns 404 status with path in debug mode" do
+      Logger.configure(level: :debug)
+
+      # Simulate a request to a nonexistent path
+      conn = conn(:get, "/nonexistent_path")
+      conn = ApiRest.call(conn, @opts)
+
+      # Verify the response
+      assert conn.state == :sent
+      assert conn.status == 404
+      assert conn.resp_body == Poison.encode!(%{status: 404, path: "/nonexistent_path"})
+    end
+
+    test "returns 404 status without body in non-debug mode" do
+      Logger.configure(level: :info)
+
+      conn = conn(:get, "/test_not_found/info")
+      conn = ApiRest.call(conn, @opts)
+
+       assert conn.state == :sent
+      assert conn.status == 404
+      assert conn.resp_body == ""
+    end
+  end
 end
diff --git a/priv/templates/structure/custom_telemetry_test.exs b/priv/templates/structure/custom_telemetry_test.exs
new file mode 100644
index 0000000..1e24f10
--- /dev/null
+++ b/priv/templates/structure/custom_telemetry_test.exs
@@ -0,0 +1,153 @@
+defmodule {app}.Utils.CustomTelemetryTest do
+  alias {app}.Utils.CustomTelemetry
+  use ExUnit.Case
+
+  setup do
+    :telemetry.detach("test-handler")
+    :ok
+  end
+
+  test "execute_custom_event emits the event with correct metric, value, and metadata" do
+    event_name = [:elixir, :custom, :metric]
+    metric = [:custom, :metric]
+    value = 200
+    metadata = %{source: "api"}
+    service_name = "{app_snake}_test"
+
+    Application.put_env(:test, :service_name, service_name)
+
+    :telemetry.attach(
+      "test-handler",
+      event_name,
+      fn _event_name, measurements, event_metadata, _config ->
+        send(self(), {:event_received, measurements, event_metadata})
+      end,
+      nil
+    )
+
+    CustomTelemetry.execute_custom_event(metric, value, metadata)
+
+    assert_receive {:event_received, %{duration: ^value},
+                    %{source: "api", service: ^service_name}}
+
+    :telemetry.detach("test-handler")
+  end
+
+  test "execute_custom_event adds service name to metadata" do
+    event_name = [:elixir, :another, :metric]
+    metric = [:another, :metric]
+    value = 100
+    metadata = %{}
+    service_name = "{app_snake}_test"
+
+    Application.put_env(:test, :service_name, service_name)
+
+    :telemetry.attach(
+      "test-handler",
+      event_name,
+      fn _event_name, measurements, event_metadata, _config ->
+        send(self(), {:event_received, measurements, event_metadata})
+      end,
+      nil
+    )
+
+    CustomTelemetry.execute_custom_event(metric, value, metadata)
+
+    assert_receive {:event_received, %{duration: ^value}, %{service: ^service_name}}
+
+    :telemetry.detach("test-handler")
+  end
+
+  test "handle_custom_event emits the event with correct metric, measures, and metadata" do
+    event_name = [:elixir, :custom, :metric]
+    metric = [:custom, :metric]
+    measures = %{duration: 200}
+    metadata = %{source: "api"}
+    service_name = "{app_snake}_test"
+
+    Application.put_env(:test, :service_name, service_name)
+
+    :telemetry.attach(
+      "test-handler",
+      event_name,
+      fn _event_name, event_measures, event_metadata, _config ->
+        send(self(), {:event_received, event_measures, event_metadata})
+      end,
+      nil
+    )
+
+    CustomTelemetry.handle_custom_event(metric, measures, metadata, nil)
+
+    assert_receive {:event_received, ^measures, %{source: "api", service: ^service_name}}
+
+    :telemetry.detach("test-handler")
+  end
+
+  test "handle_custom_event adds service name to metadata" do
+    event_name = [:elixir, :another, :metric]
+    metric = [:another, :metric]
+    measures = %{count: 100}
+    metadata = %{}
+    service_name = "{app_snake}_test"
+
+    Application.put_env(:{app_snake}, :service_name, service_name)
+
+    :telemetry.attach(
+      "test-handler",
+      event_name,
+      fn _event_name, event_measures, event_metadata, _config ->
+        send(self(), {:event_received, event_measures, event_metadata})
+      end,
+      nil
+    )
+
+    CustomTelemetry.handle_custom_event(metric, measures, metadata, nil)
+
+    assert_receive {:event_received, ^measures, %{service: ^service_name}}
+
+    :telemetry.detach("test-handler")
+  end
+
+  test "execute_custom_event handles atom metric by delegating to list implementation" do
+    metric = :custom_event
+    value = 100
+    metadata = %{source: "test_source"}
+    expected_metric_list = [metric]
+
+    :telemetry.attach(
+      "test-handler",
+      [:elixir | expected_metric_list],
+      fn _event_name, measurements, event_metadata, _config ->
+        send(self(), {:event_received, measurements, event_metadata})
+      end,
+      nil
+    )
+
+    CustomTelemetry.execute_custom_event(metric, value, metadata)
+
+    assert_receive {:event_received, %{duration: ^value}, event_metadata}
+
+    assert event_metadata[:source] == "test_source"
+  end
+
+  test "execute_custom_event emits the correct event with default metadata" do
+    metric = [:custom, :event]
+    value = 200
+    expected_metadata = %{service: "{app_snake}_test"}
+
+    :telemetry.attach(
+      "test-handler-default-metadata",
+      [:elixir | metric],
+      fn _event_name, measurements, event_metadata, _config ->
+        send(self(), {:event_received, measurements, event_metadata})
+      end,
+      nil
+    )
+
+    CustomTelemetry.execute_custom_event(metric, value)
+
+    assert_receive {:event_received, %{duration: ^value}, event_metadata}
+    assert event_metadata == expected_metadata
+  end
+
+end
diff --git a/priv/templates/structure/data_type_utils_test.exs b/priv/templates/structure/data_type_utils_test.exs
new file mode 100644
index 0000000..e2e32fd
--- /dev/null
+++ b/priv/templates/structure/data_type_utils_test.exs
@@ -0,0 +1,135 @@
+defmodule {app}.Utils.DataTypeUtilsTest do
+  alias {app}.Utils.DataTypeUtils
+  use ExUnit.Case
+
+  describe "normalize/1" do
+    test "normalizes a struct" do
+      struct = %DateTime{
+        year: 2023,
+        month: 1,
+        day: 1,
+        hour: 0,
+        minute: 0,
+        second: 0,
+        time_zone: "Etc/UTC",
+        zone_abbr: "UTC",
+        utc_offset: 0,
+        std_offset: 0
+      }
+
+      assert DataTypeUtils.normalize(struct) == struct
+    end
+
+    test "normalizes a map" do
+      map = %{"key" => "value"}
+      assert DataTypeUtils.normalize(map) == %{key: "value"}
+    end
+
+    test "normalizes a list" do
+      list = [%{"key" => "value"}]
+      assert DataTypeUtils.normalize(list) == [%{key: "value"}]
+    end
+  end
+
+  describe "base64_decode/1" do
+    test "decodes a base64 string" do
+      assert DataTypeUtils.base64_decode("SGVsbG8gd29ybGQ=") == "Hello world"
+    end
+  end
+
+  describe "extract_header/2" do
+    test "returns {:ok, value} when the header is found and value is not nil" do
+      headers = [{"content-type", "application/json"}, {"authorization", "Bearer token"}]
+      assert DataTypeUtils.extract_header(headers, "content-type") == {:ok, "application/json"}
+    end
+
+    test "returns {:error, :not_found} when the header is not found" do
+      headers = [{"content-type", "application/json"}, {"authorization", "Bearer token"}]
+      assert DataTypeUtils.extract_header(headers, "accept") == {:error, :not_found}
+    end
+  end
+
+  describe "extract_header/2 with non-list headers" do
+    test "returns an error when headers is a map" do
+      headers = %{"content-type" => "application/json"}
+
+      assert DataTypeUtils.extract_header(headers, "content-type") ==
+               {:error,
+                "headers is not a list when finding \"content-type\": %{\"content-type\" => \"application/json\"}"}
+    end
+
+    test "returns an error when headers is a string" do
+      headers = "content-type: application/json"
+
+      assert DataTypeUtils.extract_header(headers, "content-type") ==
+               {:error,
+                "headers is not a list when finding \"content-type\": \"content-type: application/json\""}
+    end
+
+    test "returns an error when headers is a tuple" do
+      headers = {"content-type", "application/json"}
+
+      assert DataTypeUtils.extract_header(headers, "content-type") ==
+               {:error,
+                "headers is not a list when finding \"content-type\": {\"content-type\", \"application/json\"}"}
+    end
+
+    test "returns an error when headers is nil" do
+      headers = nil
+
+      assert DataTypeUtils.extract_header(headers, "content-type") ==
+               {:error, "headers is not a list when finding \"content-type\": nil"}
+    end
+
+    test "returns an error when headers is an integer" do
+      headers = 123
+
+      assert DataTypeUtils.extract_header(headers, "content-type") ==
+               {:error, "headers is not a list when finding \"content-type\": 123"}
+    end
+  end
+
+  describe "format/2" do
+    test "returns true when input is 'true' and type is 'boolean'" do
+      assert DataTypeUtils.format("true", "boolean") == true
+    end
+
+    test "returns false when input is 'false' and type is 'boolean'" do
+      assert DataTypeUtils.format("false", "boolean") == false
+    end
+  end
+
+  test "returns the input value when type is ignored" do
+    assert DataTypeUtils.format(123, "any_type") == 123
+  end
+
+  test "converts system time in nanoseconds to milliseconds" do
+    assert DataTypeUtils.system_time_to_milliseconds(1_000_000_000) == 1000
+  end
+
+  test "converts monotonic time in native units to milliseconds" do
+    assert DataTypeUtils.monotonic_time_to_milliseconds(1_000_000) == 1
+  end
+
+  test "returns different numbers on subsequent calls" do
+    {:ok, confirm_number1} = DataTypeUtils.create_confirm_number()
+    {:ok, confirm_number2} = DataTypeUtils.create_confirm_number()
+
+    refute confirm_number1 == confirm_number2
+  end
+
+  test "returns the current monotonic time as an integer" do
+    start_time = DataTypeUtils.start_time()
+
+    assert is_integer(start_time)
+  end
+
+  test "calculates the duration time in milliseconds" do
+    start_time = System.monotonic_time()
+    :timer.sleep(100)
+    duration = DataTypeUtils.duration_time(start_time)
+
+    assert is_integer(duration)
+    assert duration >= 100
+  end
+end
diff --git a/priv/templates/structure/health_check_test.exs b/priv/templates/structure/health_check_test.exs
new file mode 100644
index 0000000..f402d49
--- /dev/null
+++ b/priv/templates/structure/health_check_test.exs
@@ -0,0 +1,12 @@
+defmodule {app}.Infrastructure.EntryPoints.HealthCheckTest do
+  alias {app}.Infrastructure.EntryPoint.HealthCheck
+
+  use ExUnit.Case
+
+  describe "check_http/0" do
+    test "returns :ok" do
+      assert HealthCheck.check_http() == :ok
+    end
+  end
+
+end
diff --git a/priv/templates/structure/test_application.exs b/priv/templates/structure/test_application.exs
index d65398d..9b1a338 100644
--- a/priv/templates/structure/test_application.exs
+++ b/priv/templates/structure/test_application.exs
@@ -1,9 +1,34 @@
 defmodule {app}.ApplicationTest do
   use ExUnit.Case
   doctest {app}.Application
-  alias {app}.Config.AppConfig
+  alias {app}.Config.{ConfigHolder, AppConfig}
 
   test "test childrens" do
     assert {app}.Application.env_children(:test, %AppConfig{}) == []
   end
+
+  setup do
+    if :ets.info(:{app_snake}_config) == :undefined do
+      :ets.new(:{app_snake}_config, [:public, :named_table, read_concurrency: true])
+    end
+
+    :ets.delete_all_objects(:{app_snake}_config)
+    :ok
+  end
+
+  test "conf/0 returns the current config when it exists" do
+    config = %AppConfig{env: :test, enable_server: true, http_port: 8083}
+
+    :ets.insert(:{app_snake}_config, {:config, config})
+
+    assert ConfigHolder.conf() == config
+  end
+
+  test "get!/1 raises an error when the key does not exist" do
+    :ets.delete_all_objects(:{app_snake}_config)
+
+    assert_raise RuntimeError, "Config with key :nonexistent_key not found", fn ->
+      ConfigHolder.get!(:nonexistent_key)
+    end
+  end
 end