Cypress how can I check if the background changes in a div

I have a div in which I load dynamic image depending if the user clicks on a button.

<div style="background-image: url('myimage.png')"></div>

so far this is my test:

cy.get('label').first().click();

cy.get('.bg-cover').should('have.css', 'background-image');

But how can I check if the background src changes.