object-is-loaded-matches test flakiness in nightly CI builds

[dbjorge]

Product

axe-core

Product Version

4.9.1

Latest Version

• I have tested the issue with the latest version of the product

Issue Description

Expectation

Test should work consistently

Actual

Test regularly fails (example) like this:

  object-is-loaded-matches
    ✗ returns false if the object shows any content
        expected true to be false
        AssertionError@node_modules/chai/chai.js:9227:13
        [3]</module.exports/Assertion.prototype.assert@node_modules/chai/chai.js:253:13
        [5]</module.exports/<@node_modules/chai/chai.js:1101:10
        propertyGetter@node_modules/chai/chai.js:7985:29
        proxyGetter@node_modules/chai/chai.js:9025:22
        [6]</module.exports/assert.isFalse@node_modules/chai/chai.js:4638:5
        @test/rule-matches/object-is-loaded-matches.js:37:12

Often passes on rerun

How to Reproduce

Wait for CI to fail

Additional context

n/a

[dbjorge]

change only impacts unit tests, no QA required