assert.false is not a function

[mcfiredrill]

Getting this error while running tests:

not ok 106 Chrome 90.0 - [10868 ms] - ember-cli-memory-leak-detector: detect memory leaks
    ---
        actual: >
            null
        stack: >
            TypeError: assert.false is not a function
                at Object.QUnit.test.Object.assign.validTest (http://localhost:7357/353903426377/tests/index.html?hidepassed:242:27)
        message: >
            Promise rejected during "detect memory leaks": assert.false is not a function
        negative: >
            false

Later on I see that it did seem to correctly identify which of my classes were still on the heap.

Link to CI run and PR:
https://github.com/datafruits/datafruits/pull/687/checks?check_run_id=2717081647

[steveszc]

Can you confirm which version of qunit you are using? Qunit's assert.false was added in Qunit version 12.11