Fix tests that are not rooting slots when they should. Added assert

[roryharr]

Problem

Some tests are unintentionally running on unrooted slots. While it may be valid to test, it could lead to unintentional test behaviour if not known explicitly.

Summary of Changes

• Fix the tests
• Make sure no other tests do the same by adding an assert

Fixes #

[codecov-commenter]

Codecov Report

❌ Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 82.6%. Comparing base (a79a700) to head (3000bfe).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #10038       +/-   ##
===========================================
+ Coverage    70.9%    82.6%    +11.6%     
===========================================
  Files         711      844      +133     
  Lines      211507   316654   +105147     
===========================================
+ Hits       150014   261634   +111620     
+ Misses      61493    55020     -6473     

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[brooksprumo]