correction https://travis-ci.org/GeoHealth/HAppi_backend/builds/211747790 mutant failure
correction https://travis-ci.org/GeoHealth/HAppi_backend/builds/211747790 mutant failure

GeoHealth/HAppi_backend,GeoHealth/HAppi_backend,GeoHealth/HAppi_backend,GeoHealth/HAppi_backend,GeoHealth/HAppi_backend