test: Re-enable simple mode test

[kanru]

Fixes #215

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.37%. Comparing base (468abbb) to head (c171aed).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #216   +/-   ##
=======================================
  Coverage   54.37%   54.37%           
=======================================
  Files          17       17           
  Lines        2067     2067           
=======================================
  Hits         1124     1124           
  Misses        943      943           

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