clean up the testutils

[marten-seemann]

No description provided.

[codecov]

Codecov Report

Merging #3104 (d71cef2) into master (81d16a9) will not change coverage.
The diff coverage is n/a.

❗ Current head d71cef2 differs from pull request most recent head 7c8f729. Consider uploading reports for the commit 7c8f729 to get more accurate results

@@           Coverage Diff           @@
##           master    #3104   +/-   ##
=======================================
  Coverage   85.47%   85.47%           
=======================================
  Files         131      131           
  Lines        9650     9650           
=======================================
  Hits         8248     8248           
  Misses       1034     1034           
  Partials      368      368           

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