Add tests to cover changes in v10.18.2

[danjm]

Explanation

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Before

After

Manual Testing Steps

Pre-Merge Checklist

• [ ] PR template is filled out
• [ ] IF this PR fixes a bug, a test that would have caught the bug has been added
• [ ] PR is linked to the appropriate GitHub issue
• [ ] PR has been added to the appropriate release Milestone

+ If there are functional changes:

• [ ] Manual testing complete & passed
• [ ] "Extension QA Board" label has been applied

[github-actions[bot]]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.