Changed Drei tests to give more sensible information on errors.
Changed Drei tests to give more sensible information on errors.

swflint/McCLIM,antifuchs/mcclim,onixie/mcclim,slyrus/mcclim,swflint/McCLIM,onixie/mcclim,slyrus/mcclim,onixie/mcclim,swflint/McCLIM,antifuchs/mcclim