anchor.diff:  % Test cases
   -export([
            old_node_persisting_chain_and_not_mining_has_genesis_as_top/1,
  +         new_node_persisting_chain_and_not_mining_has_same_old_genesis_as_top/1,
            new_nodes_can_mine_and_sync_fast_minimal_chain_with_pow/1,
            restore_db_backup_on_old_node/1,
            old_node_can_receive_chain_from_other_old_node/1,
  
positive.code:     ok.
  
  init_per_group(assumptions, Config) -> Config;
  init_per_group(hard_fork, Config) -> Config;
  init_per_group(hard_fork_all, Config) ->
      {_, {restore_db_backup_on_old_node, SavedCfg}} =
  
negative.code: 
  end_per_testcase(old_node_persisting_chain_and_not_mining_has_genesis_as_top, Config) ->
      aest_nodes:ct_cleanup(Config);
  end_per_testcase(new_node_persisting_chain_and_not_mining_has_same_old_genesis_as_top, Config) ->
      aest_nodes:ct_cleanup(Config);
  end_per_testcase(new_nodes_can_mine_and_sync_fast_minimal_chain_with_pow, Config) ->
      aest_nodes:ct_cleanup(Config);
  end_per_testcase(restore_db_backup_on_old_node, Config) ->
  