espec not launched

[confucius]

ESpec is not fired despite being specified as the testing library in the WhiteBread context file:

mix white_bread.run
loading all contexts from features/contexts/**
** (exit) exited in: GenServer.call(:espec_specs_agent, {:update, #Function<0.60990145/1 in ESpec.add_spec/1>}, 5000)
** (EXIT) no process: the process is not alive or there's no process currently associated with the given name, possibly because its application isn't started
(elixir) lib/gen_server.ex:979: GenServer.call/3
features/contexts/white_bread_context.exs:2: (module)
(stdlib) erl_eval.erl:680: :erl_eval.do_apply/6

mix.exs declares the following dependencies:
{:white_bread, "~> 4.5", only: [:dev, :test]},

{:espec, "~> 1.7", only: [:dev, :test]},

{:poison, "~> 4.0", override: true}

And white_bread_context.exs is:
defmodule WhiteBreadContext do
use WhiteBread.Context, test_library: :espec
end

[meadsteve]

@confucius I think this is a flaw with the documentation. test_library: :espec only tells whitebread to use espec assertions. Espec needs to be started up outside of whitebread.