anchor.diff:  init_per_testcase(sub_app_deps, Config) ->
       rebar_test_utils:init_rebar_state(Config);
   init_per_testcase(http_proxy_settings, Config) ->
  +    %% Create private rebar.config
  +    Priv = ?config(priv_dir, Config),
  +    GlobalDir = filename:join(Priv, "global"),
  +    GlobalConfigDir = filename:join([GlobalDir, ".config", "rebar3"]),
  +    GlobalConfig = filename:join([GlobalDir, ".config", "rebar3", "rebar.config"]),
  +
  +    meck:new(rebar_dir, [passthrough]),
  +    meck:expect(rebar_dir, global_config, fun() -> GlobalConfig end),
  +    meck:expect(rebar_dir, global_cache_dir, fun(_) -> GlobalDir end),
  +
  +    %% Insert proxy variables into config
  +    rebar_test_utils:create_config(GlobalConfigDir,
  +                                   [{http_proxy, "http://localhost:1234"}
  +    ]),
       rebar_test_utils:init_rebar_state(Config);
   init_per_testcase(https_proxy_settings, Config) ->
  -    rebar_test_utils:init_rebar_state(Config);
  +    {OTPVersion, _} = string:to_integer(erlang:system_info(otp_release)),
  +    case OTPVersion of
  +        Vsn when Vsn =< 15 ->
  +            {skip, https_proxy_unsupported_before_R16};
  +        _ ->
  +            %% Create private rebar.config
  +            Priv = ?config(priv_dir, Config),
  +            GlobalDir = filename:join(Priv, "global"),
  +            GlobalConfigDir = filename:join([GlobalDir, ".config", "rebar3"]),
  +            GlobalConfig = filename:join([GlobalDir, ".config", "rebar3", "rebar.config"]),
  +
  +            meck:new(rebar_dir, [passthrough]),
  +            meck:expect(rebar_dir, global_config, fun() -> GlobalConfig end),
  +            meck:expect(rebar_dir, global_cache_dir, fun(_) -> GlobalDir end),
  +
  +            %% Insert proxy variables into config
  +            rebar_test_utils:create_config(GlobalConfigDir,
  +                                           [{https_proxy, "http://localhost:1234"}
  +            ]),
  +            rebar_test_utils:init_rebar_state(Config)
  +    end;
   init_per_testcase(Case, Config) ->
       {Deps, Warnings, Expect} = deps(Case),
       Expected = case Expect of
  
positive.code:      {warnings, Warnings}
      | setup_project(Case, Config, rebar_test_utils:expand_deps(DepsType, Deps))].
  
  end_per_testcase(_, Config) ->
      meck:unload(),
      Config.
  
negative.code:       {ok, [{app, Name}, {dep, "a"}, {dep, "b", "1.0.0"}, {dep, "c", "1.0.0"}]}).
  
  
  http_proxy_settings(_Config) ->
      %% Load config
      rebar_utils:set_httpc_options(),
      rebar3:init_config(),
  
      %% Assert variable is right
      ?assertEqual({ok,{{"localhost", 1234}, []}},
                   httpc:get_option(proxy, rebar)).
  
  https_proxy_settings(_Config) ->
      %% Load config
      rebar_utils:set_httpc_options(),
      rebar3:init_config(),
  
      %% Assert variable is right
      ?assertEqual({ok,{{"localhost", 1234}, []}},
                   httpc:get_option(https_proxy, rebar)).
  
  
  run(Config) ->
  