Check property of JSON response in Postman

In the Tests section of any request you can check if the JSON response contains or doesn’t contain a specific property like this: // Verify that header object is NOT returned pm.test(“Verify that header:{…} object is NOT returned”, function () {  pm.expect(pm.response.json()).to.not.have.property(‘header’); }); // Verify that data object is returned pm.test(“Verify that data:{…} object is returned”, function () {  pm.expect(pm.response.json()).to.have.property(‘data’); …