Dependency check fails when in test environment

Hi,

I recently tried to upgrade a small application to ecto2 and sqlite_ecto2. Previously I could just run mix test to run my tests, but now if I do that dependency check fails while running tests:

$ mix test
Unchecked dependencies for environment test:

• decimal (Hex package)
  the dependency does not match the requirement “~> 1.2”, got “1.1.2”
• ecto (Hex package)
  the dependency does not match the requirement “~> 2.2”, got “1.1.9”
• sqlitex (Hex package)
  the dependency does not match the requirement “~> 1.3.2 or ~> 1.4”, got “0.8.0”
  ** (Mix) Can’t continue due to errors on dependencies

There is a difference in the output of mix deps when run in the different environments:

$ MIX_ENV=test mix deps

• esqlite 0.2.3 (Hex package) (rebar3)
  locked at 0.2.3 (esqlite) 1a8b6087
  ok
• connection 1.0.4 (Hex package) (mix)
  locked at 1.0.4 (connection) a1cae722
  ok
• ranch 1.3.2 (Hex package) (rebar3)
  locked at 1.3.2 (ranch) e4965a14
  ok
• poolboy 1.5.1 (Hex package) (rebar)
  locked at 1.5.1 (poolboy) 6b461639
  ok
• decimal (Hex package) (mix)
  locked at 1.4.1 (decimal) ad9e501e
  the dependency does not match the requirement “~> 1.2”, got “1.1.2”
• sbroker 1.0.0 (Hex package) (rebar3)
  locked at 1.0.0 (sbroker) 28ff1b5e
  ok
• db_connection 1.1.2 (Hex package) (mix)
  locked at 1.1.2 (db_connection) 2865c2a4
  ok
• ecto (Hex package) (mix)
  locked at 2.2.7 (ecto) 2074106f
  the dependency does not match the requirement “~> 2.2”, got “1.1.9”
• cowlib 1.0.2 (Hex package) (rebar3)
  locked at 1.0.2 (cowlib) 9d769a1d
  ok
• cowboy 1.1.2 (Hex package) (rebar3)
  locked at 1.1.2 (cowboy) 61ac29ea
  ok
• mime 1.2.0 (Hex package) (mix)
  locked at 1.2.0 (mime) 78adaa84
  ok
• plug 1.4.3 (Hex package) (mix)
  locked at 1.4.3 (plug) 236d77ce
  ok
• sqlitex (Hex package) (mix)
  locked at 1.3.3 (sqlitex) 3aac5fd7
  the dependency does not match the requirement “~> 1.3.2 or ~> 1.4”, got “0.8.0”
• sqlite_ecto2 2.2.2 (Hex package) (mix)
  locked at 2.2.2 (sqlite_ecto2) 7a3e5c05
  ok

And in prod or dev:

$ mix deps

• esqlite 0.2.3 (Hex package) (rebar3)
  locked at 0.2.3 (esqlite) 1a8b6087
  ok
• connection 1.0.4 (Hex package) (mix)
  locked at 1.0.4 (connection) a1cae722
  ok
• ranch 1.3.2 (Hex package) (rebar3)
  locked at 1.3.2 (ranch) e4965a14
  ok
• poolboy 1.5.1 (Hex package) (rebar)
  locked at 1.5.1 (poolboy) 6b461639
  ok
• decimal 1.4.1 (Hex package) (mix)
  locked at 1.4.1 (decimal) ad9e501e
  ok
• sbroker 1.0.0 (Hex package) (rebar3)
  locked at 1.0.0 (sbroker) 28ff1b5e
  ok
• db_connection 1.1.2 (Hex package) (mix)
  locked at 1.1.2 (db_connection) 2865c2a4
  ok
• ecto 2.2.7 (Hex package) (mix)
  locked at 2.2.7 (ecto) 2074106f
  ok
• cowlib 1.0.2 (Hex package) (rebar3)
  locked at 1.0.2 (cowlib) 9d769a1d
  ok
• cowboy 1.1.2 (Hex package) (rebar3)
  locked at 1.1.2 (cowboy) 61ac29ea
  ok
• mime 1.2.0 (Hex package) (mix)
  locked at 1.2.0 (mime) 78adaa84
  ok
• plug 1.4.3 (Hex package) (mix)
  locked at 1.4.3 (plug) 236d77ce
  ok
• sqlitex 1.3.3 (Hex package) (mix)
  locked at 1.3.3 (sqlitex) 3aac5fd7
  ok
• sqlite_ecto2 2.2.2 (Hex package) (mix)
  locked at 2.2.2 (sqlite_ecto2) 7a3e5c05
  ok

Since I’m quite new to this I don’t understand these differences, they might me explainable but not by me. This is my mix.exs:

defmodule Helloplug.Mixfile do
  use Mix.Project

  def project do
    [
      app: :helloplug,
      version: "0.1.0",
      elixir: "~> 1.5",
      start_permanent: Mix.env == :prod,
      deps: deps()
    ]
  end

  # Run "mix help compile.app" to learn about applications.
  def application do
    [
      extra_applications: [:logger, :sqlite_ecto2, :ecto, :cowboy, :plug],
      mod: {WebsiteRouter, []}
    ]
  end

  # Run "mix help deps" to learn about dependencies.
  defp deps do
    [
      {:cowboy, "~> 1.1"},
      {:plug, "~> 1.4"},
      {:sqlite_ecto2, "~> 2.2"},
      {:ecto, "~> 2.2"}
    ]
  end
end