mycroft-core: Tests for invalid phonemes fallbacks fail on latest pocketsphinx

I’m running the tests on Alpine Linux using system packages and Python 3.8.

I currently have all tests succeeding except for PocketSphinxTest.testInvalid and LocalRecognizerInitTest.testListenerConfig. It seems the fallback for invalid phonemes isn’t working.

============================================================= FAILURES ==============================================================
___________________________________________________ PocketSphinxTest.testInvalid ____________________________________________________

self = <test.unittests.client.test_hotword_factory.PocketSphinxTest testMethod=testInvalid>

    def testInvalid(self):
        config = {
            'hey Zeds': {
                'module': 'pocketsphinx',
                'phonemes': 'ZZZZZZZZZ',
                'threshold': 1e-90
            }
        }
        p = HotWordFactory.create_hotword('hey Zeds', config)
>       self.assertEqual(p.phonemes, 'HH EY . M AY K R AO F T')
E       AssertionError: 'ZZZZZZZZZ' != 'HH EY . M AY K R AO F T'
E       - ZZZZZZZZZ
E       + HH EY . M AY K R AO F T

test/unittests/client/test_hotword_factory.py:43: AssertionError
------------------------------------------------------- Captured stdout call --------------------------------------------------------
2020-05-06 14:10:53.204 | INFO     |  7488 | mycroft.client.speech.hotword_factory:load_module:386 | Loading "hey Zeds" wake word via pocketsphinx
____________________________________________ LocalRecognizerInitTest.testListenerConfig _____________________________________________

self = <test.unittests.client.test_local_recognizer.LocalRecognizerInitTest testMethod=testListenerConfig>
mock_config_get = <MagicMock name='get' id='139759354767968'>

    @patch.object(Configuration, 'get')
    def testListenerConfig(self, mock_config_get):
        """Ensure that the fallback method collecting phonemes etc.
        from the listener config works.
        """
        test_config = base_config()
        mock_config_get.return_value = test_config
    
        # Test "Hey Mycroft"
        rl = RecognizerLoop()
        self.assertEqual(rl.wakeword_recognizer.key_phrase, "hey mycroft")
    
        # Test "Hey Victoria"
        test_config['listener']['wake_word'] = 'hey victoria'
        test_config['listener']['phonemes'] = 'HH EY . V IH K T AO R IY AH'
        test_config['listener']['threshold'] = 1e-90
        rl = RecognizerLoop()
        self.assertEqual(rl.wakeword_recognizer.key_phrase, "hey victoria")
    
        # Test Invalid"
        test_config['listener']['wake_word'] = 'hey victoria'
        test_config['listener']['phonemes'] = 'ZZZZZZZZZZZZ'
        rl = RecognizerLoop()
>       self.assertEqual(rl.wakeword_recognizer.key_phrase, "hey mycroft")
E       AssertionError: 'hey victoria' != 'hey mycroft'
E       - hey victoria
E       + hey mycroft

test/unittests/client/test_local_recognizer.py:76: AssertionError