anchor.diff:  
   should_append_a_contacts_with_the_same_bucket_index({KbucketPid, _}) ->
       PeerContact    = {self(), 2#1111}, % distance of 2 from OwningId
  -    AnotherContact = {self(), 2#1110}, %distance of 3 from OwningId
  +    AnotherContact = {self(), 2#1110}, % distance of 3 from OwningId
   
  -    ok = kbucket:put(KbucketPid, PeerContact),
  -    ok = kbucket:put(KbucketPid, AnotherContact),
  +    put_contacts(KbucketPid, [PeerContact, AnotherContact]),
   
       [?_assertEqual([PeerContact, AnotherContact], kbucket:get(KbucketPid, 1))].
   
   should_update_an_already_present_contacts({KbucketPid, _}) ->
       PeerContact    = {self(), 2#1111},
       AnotherContact = {self(), 2#1110},
  -    ok = kbucket:put(KbucketPid, PeerContact),
  -    ok = kbucket:put(KbucketPid, AnotherContact),
  +    put_contacts(KbucketPid, [PeerContact, AnotherContact]),
   
       ok = kbucket:put(KbucketPid, PeerContact),
   
  
positive.code:      ?_assertEqual([OneBucketContact], kbucket:get(KbucketPid, 1)),
       ?_assertEqual([TwoBucketContact], kbucket:get(KbucketPid, 2)),
       ?_assertEqual([ThreeBucketContact], kbucket:get(KbucketPid, 3))].
  
negative.code:     FivePeerContact  = {self(), 2#1000},
      SixPeerContact   = {self(), 2#1011},
      SevenPeerContact = {self(), 2#1010},
      put_contacts(KbucketPid, [FourPeerContact, FivePeerContact, SixPeerContact]),
  
      meck:expect(peer, check_link,  ?two_any_args(?return(ko))),
      ok = kbucket:put(KbucketPid, SevenPeerContact),
  