`aioresponses` is incompatible with aiohttp 3.14.0 - switch to `aiointercept`

Author: adubovikCreated Jun 5, 2026Updated Jun 9, 2026

Labelsinvalidquestion

Describe the bug

The folowing fix https://github.com/aio-libs/aiohttp/pull/12452 introduced a required field called stream_writer in the __init__ method of the public class aiohttp.client_reqrep.ClientResponse:

https://github.com/aio-libs/aiohttp/blob/master/aiohttp/client_reqrep.py#L219-L234

However, this breaking change has led to a bump of the minor package version: 3.13.5 => 3.14.0

This results in a lot of CI breaks accross many repos where the aiohttp bump happend automatically by dependabot to close security issue.

Is it possible to make a patch release 3.14.1 where stream_writer is an optional argument to preserve backward compatbility?

To Reproduce

Install aiohttp==3.14.0 and aioresponses==0.7.8, write a simple mock test, observe the failure:

    
        # We need to initialize headers manually
        _headers = CIMultiDict({hdrs.CONTENT_TYPE: content_type})
        if headers:
            _headers.update(headers)
        raw_headers = self._build_raw_headers(_headers)
>       resp = response_class(method, url, **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       TypeError: ClientResponse.__init__() missing 1 required keyword-only argument: 'stream_writer'

.nox/test/lib/python3.11/site-packages/aioresponses/core.py:172: TypeError

https://github.com/pnuckowski/aioresponses/issues/289

Expected behavior

Bump from aiohttp==3.13.5 to aiohttp==3.14.0 must not break dependant project/packages.

Logs/tracebacks

python-traceback

# We need to initialize headers manually
        _headers = CIMultiDict({hdrs.CONTENT_TYPE: content_type})
        if headers:
            _headers.update(headers)
        raw_headers = self._build_raw_headers(_headers)
>       resp = response_class(method, url, **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       TypeError: ClientResponse.__init__() missing 1 required keyword-only argument: 'stream_writer'

.nox/test/lib/python3.11/site-packages/aioresponses/core.py:172: TypeError

Python Version

bash

$ python --version
Python 3.11.13

aiohttp Version

bash

$ python -m pip show aiohttp
Name: aiohttp
Version: 3.14.0
Summary: Async http client/server framework (asyncio)
Home-page: https://github.com/aio-libs/aiohttp
Author: 
Author-email: 
License: Apache-2.0 AND MIT
Location: /Users/anton_dubovik/Code/GitHub/ai-dial-adapter-dial/.venv/lib/python3.11/site-packages
Requires: aiohappyeyeballs, aiosignal, attrs, frozenlist, multidict, propcache, typing_extensions, yarl
Required-by: aioresponses

multidict Version

bash

$ python -m pip show multidict
Name: multidict
Version: 6.0.4
Summary: multidict implementation
Home-page: https://github.com/aio-libs/multidict
Author: Andrew Svetlov
Author-email: [email protected]
License: Apache 2
Location: /Users/anton_dubovik/Code/GitHub/ai-dial-adapter-dial/.venv/lib/python3.11/site-packages
Requires: 
Required-by: aiohttp, yarl

propcache Version

bash

$ python -m pip show propcache
Name: propcache
Version: 0.2.0
Summary: Accelerated property cache
Home-page: https://github.com/aio-libs/propcache
Author: Andrew Svetlov
Author-email: [email protected]
License: Apache-2.0
Location: /Users/anton_dubovik/Code/GitHub/ai-dial-adapter-dial/.venv/lib/python3.11/site-packages
Requires: 
Required-by: aiohttp, yarl

yarl Version

bash

$ python -m pip show yarl
Name: yarl
Version: 1.17.2
Summary: Yet another URL library
Home-page: https://github.com/aio-libs/yarl
Author: Andrew Svetlov
Author-email: [email protected]
License: Apache-2.0
Location: /Users/anton_dubovik/Code/GitHub/ai-dial-adapter-dial/.venv/lib/python3.11/site-packages
Requires: idna, multidict, propcache
Required-by: aiohttp

OS

macOS

Related component

Client

Additional context

No response

Code of Conduct

I agree to follow the aio-libs Code of Conduct

Source: aio-libs/aiohttp

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