Tests fail on Ember 3

[olleolleolle]

Tests fail in Ember 3:

> not ok 9 Chrome 73.0 - [1 ms] - Unit | objectify: it turns an Array into an Ember Array
    ---
        actual: >
            false
        expected: >
            true
        stack: >
                at Object.<anonymous> (http://localhost:7357/assets/tests.js:67:14)
                at runTest (http://localhost:7357/assets/test-support.js:4389:30)
                at Test.run (http://localhost:7357/assets/test-support.js:4375:6)
                at http://localhost:7357/assets/test-support.js:4596:12
                at advanceTaskQueue (http://localhost:7357/assets/test-support.js:3988:6)
                at advance (http://localhost:7357/assets/test-support.js:3969:4)
        message: >
            failed, expected argument to be truthy, was: false
        negative: >
            false
        Log: |
    ...
not ok 10 Chrome 73.0 - [1 ms] - Unit | objectify: it returns a new Ember Array when given an Ember Array
    ---
        actual: >
            false
        expected: >
            true
        stack: >
                at Object.<anonymous> (http://localhost:7357/assets/tests.js:74:14)
                at runTest (http://localhost:7357/assets/test-support.js:4389:30)
                at Test.run (http://localhost:7357/assets/test-support.js:4375:6)
                at http://localhost:7357/assets/test-support.js:4596:12
                at advanceTaskQueue (http://localhost:7357/assets/test-support.js:3988:6)
                at advance (http://localhost:7357/assets/test-support.js:3969:4)
        message: >
            failed, expected argument to be truthy, was: false
        negative: >
            false
        Log: |
    ...
ok 11 Chrome 73.0 - [0 ms] - Unit | objectify: it recursively objectifies POJOs
not ok 12 Chrome 73.0 - [3 ms] - Unit | objectify: it recursively objectifies Arrays
    ---
        actual: >
            false
        expected: >
            true
        stack: >
                at Object.<anonymous> (http://localhost:7357/assets/tests.js:94:14)
                at runTest (http://localhost:7357/assets/test-support.js:4389:30)
                at Test.run (http://localhost:7357/assets/test-support.js:4375:6)
                at http://localhost:7357/assets/test-support.js:4596:12
                at advanceTaskQueue (http://localhost:7357/assets/test-support.js:3988:6)
                at advance (http://localhost:7357/assets/test-support.js:3969:4)
        message: >
            Outer array is an Ember Array
        negative: >
            false
        Log: |

Has behavior changed?