Jasmine test wrapper value is carried over to next test - vue.js

Question

My tests seem to be in conflict. Whenever I run one test after the other, the data in the wrapper stills seems to hold the values which were put in during the previous test.
I've tried adding wrapper.destroy() in the afterEach but this does not seem to make a difference.
The current failure message which I get is:
Expected $.startDate = Date(Mon Jan 01 2018 01:00:00 GMT+0100 (Central European Standard Time)) to equal null. which occurs in the test validates valid dates
import SearchDate from '../search-date';
import VeeValidate from 'vee-validate';
import {createLocalVue, shallowMount} from '#vue/test-utils';
fdescribe('SearchDate', function() {
let wrapper;
const propsData = {
dates: {startDate: null, endDate: null},
};
beforeEach(function() {
this.localVue = createLocalVue();
this.localVue.use(VeeValidate);
wrapper = shallowMount(
SearchDate,
{
localVue: this.localVue,
propsData: propsData,
},
);
});
afterEach(function() {
wrapper.destroy();
});
it('invalidates invalid dates', function(done) {
// GIVEN an instantiated SearchDate
// WHEN startDateSelected and endDataSelected functions are called with unknown arguments
wrapper.vm.startDateSelected('foobar');
wrapper.vm.endDateSelected('foobar');
// THEN expect startDate and endDate of SearchDate to be null
const expectedData = {
datepickerStartDate: null,
datepickerEndDate: null,
inputStartDate: null,
inputEndDate: null,
};
wrapper.vm.$nextTick(() => {
expect(wrapper.vm._data).toEqual(expectedData);
done();
});
});
it('validates valid dates', function(done) {
// GIVEN an instantiated SearchDate
// WHEN valid startDate and endDate are validated
const validStartDate = new Date(2018, 0, 1, 0, 0, 0);
const validEndDate = new Date(2018, 0, 2, 0, 0, 0);
wrapper.vm.startDateSelected(validStartDate);
wrapper.vm.endDateSelected(validEndDate);
// THEN the expected startDate and endDate can be found in the component data
const expectedData = {
datepickerLanguage: nl,
datepickerStartDate: null,
datepickerEndDate: null,
inputStartDate: '01-01-2018',
inputEndDate: '02-01-2018',
};
wrapper.vm.$nextTick(() => {
expect(wrapper.vm._data).toEqual(expectedData);
done();
});
});