How can I make Elixir mix test output more verbose?

In my Elixir/Phoenix app, when I run

mix test

I get output like:

$ mix test
....

Finished in 0.09 seconds
4 tests, 0 failures

with dots for each test that succeeded.

How do I output the names of the tests that succeed instead?

In Rails with rspec I used to do this with a .rspec file in the directory that looked like:

$ cat .rspec
--color
-fd
--tty

Is there an equivalent in Elixir?