anchor.diff:      Balance3 = get_balance(new_node3, PubKey3, Cfg),
       ct:log("Balance of account with public key ~p is ~p", [PubKey3, Balance3]),
       %% Reach height of switch to new protocol.
  -    run_erl_cmd_on_node(new_node3, "aec_conductor:start_mining().", "ok", 10000, Cfg),
  +    ok = run_erl_cmd_on_node(new_node3, "aec_conductor:start_mining().", 10000, Cfg),
       LastHeightOfOldProtocol = HeightOfNewProtocol - 1,
       %% Check the last block of old protocol has old version.
       wait_for_height_syncing(LastHeightOfOldProtocol, [new_node3], {{10000, ms}, {1000, blocks}}, Cfg),
  
positive.code:     PubKey3 = get_public_key(new_node3, Cfg),
      Balance3 = get_balance(new_node3, PubKey3, Cfg),
      ct:log("Balance of account with public key ~p is ~p", [PubKey3, Balance3]),
      run_erl_cmd_on_node(new_node3, "aec_conductor:start_mining().", "ok", 10000, Cfg),
      MinedReward = 100,
      aest_nodes:wait_for_value({balance, PubKey3, MinedReward}, [new_node3], 10000, Cfg),
      MinedBalance = get_balance(new_node3, PubKey3, Cfg),
  
negative.code:             "{Cs, _} = {aeu_mtrees:to_list(CT), get_contract_list},~n"
              "length(Cs).",
              [TopHash])),
      0 = run_erl_cmd_on_node(new_node3, ErlCmd, 30000, Cfg),
      {save_config,
       [{old_node_left_running_with_old_chain, old_node1},
        {new_node_left_running_with_synced_old_chain, new_node3}]}.
  