text: Title: Test coverage 100%
  Body: For now the tests cover 87% of our code base, it would be cool if we can reach the 100% !
  
  ```
  Name                              Stmts   Miss  Cover   Missing
  ---------------------------------------------------------------
  responder/__init__.py                 2      0   100%
  responder/__main__.py                 3      3     0%   1-4
  responder/__version__.py              1      0   100%
  responder/api.py                    351     51    85%   94, 166, 173, 191, 199-206, 271, 325, 393, 416-418, 429-431, 469, 476-478, 481, 493, 499, 513-521, 618, 658-661, 688-701, 704-706
  responder/app.py                     12     12     0%   1-21
  responder/background.py              34      4    88%   28-31
  responder/cli.py                     18     14    22%   22-43
  responder/core.py                     3      0   100%
  responder/ext/__init__.py             1      0   100%
  responder/ext/graphql.py             30      2    93%   35, 41
  responder/formats.py                 58      2    97%   12, 51
  responder/models.py                 200     13    94%   41-42, 53-55, 178-179, 214, 222, 228, 247, 252, 349
  responder/routes.py                  51      2    96%   32, 40
  responder/statics.py                  5      0   100%
  responder/status_codes.py            17      0   100%
  responder/templates/__init__.py       1      0   100%
  ---------------------------------------------------------------
  TOTAL                               787    103    87%
  
  ```  