如何让pytest正确提交flask wtforms表单？

from flask import Flask
from flask_wtf import FlaskForm
from wtforms import StringField, SubmitField

class MyForm(FlaskForm):
    name = StringField('Name')
    submit = SubmitField('Submit')

def test_submit_form():
    app = Flask(__name__)
    app.config['SECRET_KEY'] = 'your_secret_key'
    with app.test_request_context():
        form = MyForm()
        form.name.data = 'John Doe'
        response = app.post('/submit', data=form.data)
        assert response.status_code == 200
        assert b'Success' in response.data