Mawriks

В общем нужно подключить в moutn vuetify.
Ниже есть пример, как сделать кастомный mount.

import * as components from "vuetify/components";
import * as directives from "vuetify/directives";

const vuetify = createVuetify({
	components,
	directives,
});

export const customMount = (
	component: any,
	options: RenderOptions | undefined = {},
	globalOptions: any = {},
) => {
	return mount(component, {
		...options,
		global: {
			plugins: [vuetify],
			...globalOptions,
		},
	});
};