   defmacro test(message) do
     quote bind_quoted: binding do
       test = :"test #{message}"
-      ExUnit.Case.__on_definition__(__ENV__, test)
+      ExUnit.Case.__on_definition__(__ENV__, test, [:not_implemented])
       def unquote(test)(_), do: flunk("Not yet implemented")
     end
   end

  end

  @doc false
  def __on_definition__(env, name) do
    mod  = env.module
    tags = Module.get_attribute(mod, :tag) ++ Module.get_attribute(mod, :moduletag)
    tags = tags |> normalize_tags |> Map.merge(%{line: env.line, file: env.file})

    test = %ExUnit.Test{name: name, case: mod, tags: tags}

  Provides a convenient macro that allows a test to be
  defined with a string, but not yet implemented. The
  resulting test will always fail and print "Not yet
  implemented" error message. The resulting test case is
  also tagged with :not_implemented.

  ## Examples

