ExUnit without assert/refute, relying solely on pattern matching?

I'm testing the return value of a function. Which of the two is the preferred way?

test "extra verbose, using assert" do
  {:error, reason} = MyModule.my_fun
  assert reason == :nope
end

test "using pattern matching only" do
  {:error, :nope} = MyModule.my_fun
end

I like the first one because, I don't now, a test needs an assert statement and the error message when running the test is more descriptive. Otoh, a MatchError with line number should also be enough.