Improve mix test to rely on possible multiple messages
Improve mix test to rely on possible multiple messages

ggcampinho/elixir,beedub/elixir,kimshrier/elixir,gfvcastro/elixir,elixir-lang/elixir,michalmuskala/elixir,kelvinst/elixir,ggcampinho/elixir,antipax/elixir,joshprice/elixir,antipax/elixir,lexmag/elixir,pedrosnk/elixir,gfvcastro/elixir,pedrosnk/elixir,kimshrier/elixir,kelvinst/elixir,beedub/elixir,lexmag/elixir