from pathlib import Path

path=Path(__file__).parent/'run_isolated.py'
text=path.read_text(encoding='utf-8')
old='mock.patch.object(requests.sessions.Session, "request", side_effect=blocked("HTTP request"))'
new='mock.patch.object(requests.adapters.HTTPAdapter, "send", side_effect=blocked("HTTP transport"))'
assert old in text
path.write_text(text.replace(old,new),encoding='utf-8')