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Yes i tried with origin But it is not working <@999682523909075064> . I think it is not focused on new window 
       cy.origin("https://test.adyen.com/", () => {
            cy.url().then(url => {
                cy.visit(url);
                cy.wait(5000);
                cy.clickElementInIframe(this.confirmPaymentButton);
                cy.urlShouldIncludeText('step=3');
            });
        })