from tests import app from flask import make_response @app.route("/assert-header") def assert_header(): resp = make_response() resp.headers['Header1'] = 'value1' resp.headers['ETag'] = '"33a64df551425fcc55e4d42a148795d9f25f89d4"' resp.set_cookie('cookie1', 'value1') resp.set_cookie('cookie2', 'value2') resp.set_cookie('cookie3', 'value3') return resp