       # File: assertion_test.exs
 
       # 1) Start ExUnit.
-      ExUnit.start
+      ExUnit.start()
 
       # 2) Create a new test module (test case) and use "ExUnit.Case".
       defmodule AssertionTest do


      * `:name` - the test name
      * `:module` - the test module
      * `:state` - the test error state (see ExUnit.state)
      * `:time` - the time to run the test
      * `:tags` - the test tags
      * `:logs` - the captured logs

  (the same ones accepted by `configure/1`).

  If you want to run tests manually, you can set the `:autorun` option
  to `false` and use `run/0` to run tests.
  """
  def start(options \\ []) do
    {:ok, _} = Application.ensure_all_started(:ex_unit)
