Vue testing - jest not working for dropdown

I want to test my dropdown

and I am able to change the dropdown once but after that I am not able to change it again

This is the first time where the test works for once, but after this is does not work again

    VueWrapper {
  isFunctionalComponent: undefined,
  _emitted: [Object: null prototype] {
    'dc:mounted': [ [Array], [Array], [Array], [Array], [Array], [Array] ]
  },
  _emittedByOrder: [
    { name: 'dc:mounted', args: [Array] },
    { name: 'dc:mounted', args: [Array] },
    { name: 'dc:mounted', args: [Array] },
    { name: 'dc:mounted', args: [Array] },
    { name: 'dc:mounted', args: [Array] },
    { name: 'dc:mounted', args: [Array] }
  ],
  selector: { name: 'dc-dropdown' }
}

but after that I get this, I want to change the "change" object again but it does not work,

VueWrapper {
  isFunctionalComponent: undefined,
  _emitted: [Object: null prototype] {
    'dc:mounted': [ [Array], [Array], [Array], [Array], [Array], [Array] ],
    change: [ [Array] ]
  },
  _emittedByOrder: [
    { name: 'dc:mounted', args: [Array] },
    { name: 'dc:mounted', args: [Array] },
    { name: 'dc:mounted', args: [Array] },
    { name: 'dc:mounted', args: [Array] },
    { name: 'dc:mounted', args: [Array] },
    { name: 'dc:mounted', args: [Array] },
    { name: 'change', args: [Array] }
  ],
  selector: { name: 'dc-dropdown' }
}