[test][prefix][plotters] add default uses key. Fixes #83

2 jobs from 83_fix_key_uses_in_test_plotters in 20 minutes and 2 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #167037
docker-build
build_linux_36

00:14:54

64.0%
passed #167038
macosx
build_macosx_36

00:20:02

64.0%