Dependencies errors: Unchecked dependencies for environment test:

What does it mean? Here are my deps:

  defp deps do
    [{:phoenix, "~> 1.2.1"},
     {:phoenix_pubsub, "~> 1.0"},
     {:phoenix_html, "~> 2.9"},
     {:phoenix_live_reload, "~> 1.0", only: :dev},
     {:gettext, "~> 0.11"},
     {:poison, "~> 3.0", override: true},
     {:cowboy, "~> 1.0"},
     {:bypass, "~> 0.6.0", only: :test},
     {:sap_odata_service, in_umbrella: true}
     ]
  end