Fix enums in context filter

[bkryza]

Fixes #275

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.80%. Comparing base (aa62c47) to head (8a1c551).
Report is 4 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #276      +/-   ##
==========================================
- Coverage   86.84%   86.80%   -0.04%     
==========================================
  Files         122      122              
  Lines       13620    13622       +2     
==========================================
- Hits        11828    11825       -3     
- Misses       1792     1797       +5     

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