Fixed issue with race conditions in test further up the stack.

[daveshanley]

A race condition in vacuum is thrown during tests, this slight change fixes that by swapping over to a channel vs a timeout.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.71%. Comparing base (f866c7b) to head (31d929f).
Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #66      +/-   ##
==========================================
+ Coverage   98.96%   99.71%   +0.75%     
==========================================
  Files          19       19              
  Lines        1156     1737     +581     
==========================================
+ Hits         1144     1732     +588     
+ Misses         12        5       -7     

Flag	Coverage Δ
unittests	99.71% <100.00%> (+0.75%)	⬆️

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