Updating test runner breaks tests

[blackfalcon]

Please verify the version of auro-combobox you have installed

@latest

Please describe the bug

When updating @web/test-runner devDep 0.16.1 ❯ 0.18.0

 ❌ auro-combobox > handles the required state being set
      AssertionError: expected null to equal 'valueMissing'
        at n.<anonymous> (test/auro-combobox.test.js:359:53)

Chrome: |██████████████████████████████| 1/1 test files | 21 passed, 1 failed

Reproducing the error

This issue cannot be reproduced on the Auro docsite

Expected behavior

All tests should not fail with updated version of test runners.

What browsers are you seeing the problem on?

No response

Additional context

This issue appears to be directly related to a root issue with auro-input

• https://github.com/AlaskaAirlines/auro-input/issues/279
• https://github.com/AlaskaAirlines/auro-datepicker/issues/183

Exit criteria

This issue can be closed once the root cause has been addressed and all tests run with updated test runners.