Cypress check for multiple classes

How to check if an element has multiple classes? Couldn't find anything on the official docs, only:

cy.get('form').find('input').should('have.class', 'disabled')

or

expect($el).to.have.class('foo')

When inserting multiple class names, I get an error:

expect($el).to.have.class('foo bar baz')

Is there a solution?