Fix unstable integration test

[pkosiec]

• Fix incorrect async/await usage when iterating over test collections

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@0fc1ba6). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #177   +/-   ##
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  Coverage        ?   93.50%           
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  Files           ?       18           
  Lines           ?      277           
  Branches        ?       50           
=======================================
  Hits            ?      259           
  Misses          ?        7           
  Partials        ?       11           

Flag	Coverage Δ
cli	93.75% <0.00%> (?)
core	93.42% <0.00%> (?)

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