{plugins, [rebar3_proper]}.

{profiles,
    [{test, [
        {erl_opts, ["DHUT_NOOP"]},
        {deps, [
                {proper, {git, "https://github.com/manopapad/proper", {tag, "v1.2"}}}
               ]}
    ]}
]}.

{deps, [
        {hut, "1.2.0"}
       ]
}.