Fix some fluky tests

[AlekSi]

Refs #335.

[codecov]

Codecov Report

Merging #351 (52b256f) into main (0ec1502) will increase coverage by 1.64%.
The diff coverage is n/a.

❗ Current head 52b256f differs from pull request most recent head cc157a1. Consider uploading reports for the commit cc157a1 to get more accurate results

@@            Coverage Diff             @@
##             main     #351      +/-   ##
==========================================
+ Coverage   49.28%   50.93%   +1.64%     
==========================================
  Files         114      118       +4     
  Lines        5440     5847     +407     
==========================================
+ Hits         2681     2978     +297     
- Misses       2323     2427     +104     
- Partials      436      442       +6     

Impacted Files	Coverage Δ
internal/handlers/common/params.go	42.85% <0.00%> (-7.15%)	⬇️
internal/handlers/msg_collstats.go	54.54% <0.00%> (-2.60%)	⬇️
internal/handlers/command.go	66.66% <0.00%> (-2.57%)	⬇️
cmd/envtool/main.go	0.00% <0.00%> (ø)
internal/types/types.go	94.11% <0.00%> (ø)
internal/types/document.go	78.66% <0.00%> (ø)
internal/clientconn/conn.go	0.00% <0.00%> (ø)
internal/handlers/common/filter.go
internal/handlers/common/compare.go
internal/handlers/jsonb1/msg_count.go
... and 26 more

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[seeforschauer]

but. lints not passed

[AlekSi]

Yeah, that line fails sometimes, trying to understand how…