anchor.diff:  %% Tests
   -export(
       [ t_basic_uniqueness_amd_storage/1
  +    , t_low_entropy/1
       ]).
   
   
  
positive.code:     {ok, ok}           = oauth1_verifier:store(VerifierA),
      {ok, VerifierA}    = oauth1_verifier:fetch(TmpTokenID),
      {error, not_found} = oauth1_verifier:fetch({tmp, <<"nonexistent">>}).
  
negative.code: groups() ->
      Tests =
          [ t_basic_uniqueness_amd_storage
          , t_low_entropy
          % TODO: Test storage errors
          ],
      Properties = [],
  