Bug: Testcontainer fails to fetch server api version on 4.11 but works on 4.10

[KantiCodes]

Describe the bug

Hey seems like you released a new minor version 2 hours ago and it has a bug in it.

Bug: Testcontainer fails to fetch server api version on 4.11 but works on 4.10
To Reproduce

Install version 4.11 and try to run the from testcontainers.mssql import DbContainer, SqlServerContainer

>>> from testcontainers.mssql import DbContainer, SqlServerContainer
Traceback (most recent call last):
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connectionpool.py", line 787, in urlopen
    response = self._make_request(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connectionpool.py", line 493, in _make_request
    conn.request(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connection.py", line 445, in request
    self.endheaders()
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 1277, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 1037, in _send_output
    self.send(msg)
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 975, in send
    self.connect()
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/transport/unixconn.py", line 26, in connect
    sock.connect(self.unix_socket)
FileNotFoundError: [Errno 2] No such file or directory

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/requests/adapters.py", line 667, in send
    resp = conn.urlopen(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connectionpool.py", line 841, in urlopen
    retries = retries.increment(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/util/retry.py", line 474, in increment
    raise reraise(type(error), error, _stacktrace)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/util/util.py", line 38, in reraise
    raise value.with_traceback(tb)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connectionpool.py", line 787, in urlopen
    response = self._make_request(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connectionpool.py", line 493, in _make_request
    conn.request(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/urllib3/connection.py", line 445, in request
    self.endheaders()
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 1277, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 1037, in _send_output
    self.send(msg)
  File "/home/bartek/.local/share/uv/python/cpython-3.10.8-linux-x86_64-gnu/lib/python3.10/http/client.py", line 975, in send
    self.connect()
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/transport/unixconn.py", line 26, in connect
    sock.connect(self.unix_socket)
urllib3.exceptions.ProtocolError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/api/client.py", line 223, in _retrieve_server_version
    return self.version(api_version=False)["ApiVersion"]
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/api/daemon.py", line 181, in version
    return self._result(self._get(url), json=True)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/utils/decorators.py", line 44, in inner
    return f(self, *args, **kwargs)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/api/client.py", line 246, in _get
    return self.get(url, **self._set_request_timeout(kwargs))
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/requests/sessions.py", line 602, in get
    return self.request("GET", url, **kwargs)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/requests/sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/requests/sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/requests/adapters.py", line 682, in send
    raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/testcontainers/mssql/__init__.py", line 4, in <module>
    from testcontainers.core.generic import DbContainer
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/testcontainers/core/generic.py", line 16, in <module>
    from testcontainers.core.container import DockerContainer
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/testcontainers/core/container.py", line 12, in <module>
    from testcontainers.core.config import ConnectionMode
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/testcontainers/core/config.py", line 52, in <module>
    RYUK_DOCKER_SOCKET: str = get_docker_socket()
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/testcontainers/core/config.py", line 36, in get_docker_socket
    client = docker.from_env()
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/client.py", line 94, in from_env
    return cls(
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/client.py", line 45, in __init__
    self.api = APIClient(*args, **kwargs)
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/api/client.py", line 207, in __init__
    self._version = self._retrieve_server_version()
  File "/home/bartek/projects/US/framework/.venv/lib/python3.10/site-packages/docker/api/client.py", line 230, in _retrieve_server_version
    raise DockerException(
docker.errors.DockerException: Error while fetching server API version: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

Runtime environment

Ubuntu, python 3.10.8

(bartek) ➜  ~ git:(main) ✗ uv pip list
Package            Version
------------------ ---------
certifi            2025.6.15
charset-normalizer 3.4.2
docker             7.1.0
idna               3.10
python-dotenv      1.1.0
requests           2.32.4
testcontainers     4.11.0
typing-extensions  4.14.0
urllib3            2.4.0
wrapt              1.17.2

EDIT:

I took a dig myself to try to find the culprit

kudos to @chbndrhnns to realizing it connects

4.10

testcontainers/core/config.py: 34

• RYUK_DOCKER_SOCKET: str = environ.get("TESTCONTAINERS_DOCKER_SOCKET_OVERRIDE", "/var/run/docker.sock")

4.11

testcontainers/core/config.py:52

• RYUK_DOCKER_SOCKET: str = get_docker_socket()

Where the get_docker_socket connects

[chbndrhnns]

I think the problem is it tries to connect on import. I find that strange. I have this case for AsyncRedisContainer which imported fine until 4.10. It's fine there because I am able to set a DOCKER_HOST variable and the connection attempt happens at a later point.

[christianplatta1012]

same here, version 4.11 breaks it because some docker API calls already happen during import time

[alexanderankin]

does #831 fix?

pip install -U git+https://github.com/testcontainers/testcontainers-python.git@fix/get_docker_socket-on-import

[alexanderankin]

if someone can use the above pip command to test it on their end i would appreciate that a lot, would prefer to get a fix out sooner rather than later.

[christianplatta1012]

When I apply this patch another error occurs (I'm using colima on a Mac M1 to run docker, if this is of any importance):

ERROR         [ 63%]
test setup failed
../.venv/lib/python3.12/site-packages/docker/api/client.py:275: in _raise_for_status
    response.raise_for_status()
../.venv/lib/python3.12/site-packages/requests/models.py:1026: in raise_for_status
    raise HTTPError(http_error_msg, response=self)
E   requests.exceptions.HTTPError: 404 Client Error: Not Found for url: http+docker://localhost/v1.46/containers/b1c542d96232eafec28bf8b2b5d893f0913d559277cb61dfcc33fa731e1b20e6/json

The above exception was the direct cause of the following exception:
conftest.py:355: in postgres_container
    with start_postgres_db_test_container(resources) as postgres:
/opt/homebrew/Cellar/python@3.12/3.12.10/Frameworks/Python.framework/Versions/3.12/lib/python3.12/contextlib.py:137: in __enter__
    return next(self.gen)
conftest.py:386: in start_postgres_db_test_container
    with PostgresContainer(
../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:197: in __enter__
    return self.start()
../.venv/lib/python3.12/site-packages/testcontainers/core/generic.py:74: in start
    super().start()
../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:160: in start
    Reaper.get_instance()
../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:263: in get_instance
    Reaper._instance = Reaper._create_instance()
../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:294: in _create_instance
    wait_for_logs(Reaper._container, r".* Started!", timeout=20, raise_on_exit=True)
../.venv/lib/python3.12/site-packages/testcontainers/core/waiting_utils.py:113: in wait_for_logs
    stdout, stderr = container.get_logs()
../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:243: in get_logs
    return self._container.logs(stderr=False), self._container.logs(stdout=False)
../.venv/lib/python3.12/site-packages/docker/models/containers.py:322: in logs
    return self.client.api.logs(self.id, **kwargs)
../.venv/lib/python3.12/site-packages/docker/utils/decorators.py:19: in wrapped
    return f(self, resource_id, *args, **kwargs)
../.venv/lib/python3.12/site-packages/docker/api/container.py:896: in logs
    output = self._get_result(container, stream, res)
../.venv/lib/python3.12/site-packages/docker/api/client.py:483: in _get_result
    return self._get_result_tty(stream, res, self._check_is_tty(container))
../.venv/lib/python3.12/site-packages/docker/utils/decorators.py:19: in wrapped
    return f(self, resource_id, *args, **kwargs)
../.venv/lib/python3.12/site-packages/docker/api/client.py:479: in _check_is_tty
    cont = self.inspect_container(container)
../.venv/lib/python3.12/site-packages/docker/utils/decorators.py:19: in wrapped
    return f(self, resource_id, *args, **kwargs)
../.venv/lib/python3.12/site-packages/docker/api/container.py:793: in inspect_container
    return self._result(
../.venv/lib/python3.12/site-packages/docker/api/client.py:281: in _result
    self._raise_for_status(response)
../.venv/lib/python3.12/site-packages/docker/api/client.py:277: in _raise_for_status
    raise create_api_error_from_http_exception(e) from e
../.venv/lib/python3.12/site-packages/docker/errors.py:39: in create_api_error_from_http_exception
    raise cls(e, response=response, explanation=explanation) from e
E   docker.errors.NotFound: 404 Client Error for http+docker://localhost/v1.46/containers/b1c542d96232eafec28bf8b2b5d893f0913d559277cb61dfcc33fa731e1b20e6/json: Not Found ("No such container: b1c542d96232eafec28bf8b2b5d893f0913d559277cb61dfcc33fa731e1b20e6")

[christianplatta1012]

This is the code snippet I use to start the container:

@contextmanager
def start_postgres_db_test_container(resources: Path):
    # nasty bug in wrapt that causes PyCharm/IntelliJ  debugger to crash with: ValueError: wrapper has not been initialized
    # see:
    #  https://github.com/GrahamDumpleton/wrapt/issues/257#issuecomment-1902077286
    # https://youtrack.jetbrains.com/issue/PY-25860
    with pytest.MonkeyPatch.context() as patch:
        patch.setattr(decorators, "AdapterWrapper", PatchedAdapterWrapper)

        from testcontainers.postgres import (
            PostgresContainer,  # import must be here to avoid wrapt bug
        )

        # make testcontainers use the docker daemon from colima if it's running on a Mac and colima is installed
        with pytest.MonkeyPatch.context() as mp:
            if colima_mac_setup():
                # make testcontainers use the docker daemon from colima
                mp.setenv(
                    "TESTCONTAINERS_DOCKER_SOCKET_OVERRIDE",
                    f"{str(Path.home())}/.colima/default/docker.sock",
                )
                mp.setenv(
                    "DOCKER_HOST",
                    f"unix://{str(Path.home())}/.colima/default/docker.sock",
                )

        
            with PostgresContainer(
                image="postgres:15.5",
                port=5432,
                username="test",
                password="test",
                dbname="test",
            ) as postgres:
                yield postgres
                print(postgres.get_logs())

def colima_mac_setup():
    return (
        os.uname().sysname == "Darwin"
        and (Path.home() / ".colima" / "default" / "docker.sock").exists()
    )

[alexanderankin]

ive yankjed the release for now. need to narrow down a root cause besides the fix above then

[KantiCodes]

does #831 fix?

pip install -U git+https://github.com/testcontainers/testcontainers-python.git@fix/get_docker_socket-on-import

This solved the import error

[CarliJoy]

@christianplatta1012

(Could you please edit your stacktrace so that it is more readable)

Please add from

from testcontainers.core.config import testcontainers_config, get_docker_socket

print(testcontainers_config.ryuk_docker_socket)
print(get_docker_socket())

before the with PostgresContainer and write here what the result is.

Actually the fix(es) should make the

            if colima_mac_setup():
                # make testcontainers use the docker daemon from colima
                mp.setenv(
                    "TESTCONTAINERS_DOCKER_SOCKET_OVERRIDE",
                    f"{str(Path.home())}/.colima/default/docker.sock",
                )
                mp.setenv(
                    "DOCKER_HOST",
                    f"unix://{str(Path.home())}/.colima/default/docker.sock",
                )

unnecessary.

Please run get_docker_socket without the monkeypatch.
If this doesn't return the correct host, we need to adopt it for macos.

[GaetanLepage]

does #831 fix?

pip install -U git+https://github.com/testcontainers/testcontainers-python.git@fix/get_docker_socket-on-import

#832 is also a a workaround.

[christianplatta1012]

Sorry for the late reply, kids and work kept me busy :-).
I've tried to compile a minimal example that works in 4.10 but breaks in 4.11.

My dev setup:

I'm running this on an Apple M1 Pro, Sequoia 15.5
uname -a returns:
Darwin S0184554 24.5.0 Darwin Kernel Version 24.5.0: Tue Apr 22 19:54:49 PDT 2025; root:xnu-11417.121.6~2/RELEASE_ARM64_T6000 arm64

colima version:

colima version 0.8.1 git commit: 96598cc5b64e5e9e1e64891642b91edc8ac49d16

runtime: docker
arch: aarch64
client: v28.1.1
server: v27.1.1

colima was installed using brew.

docker version:

Client: Docker Engine - Community
Version: 28.1.1
API version: 1.46 (downgraded from 1.49)
Go version: go1.24.2
Git commit: 4eba377327
Built: Fri Apr 18 09:44:47 2025
OS/Arch: darwin/arm64
Context: colima

Server: Docker Engine - Community
Engine:
Version: 27.1.1
API version: 1.46 (minimum version 1.24)
Go version: go1.21.12
Git commit: cc13f95
Built: Tue Jul 23 20:00:07 2024
OS/Arch: linux/arm64
Experimental: false
containerd:
Version: 1.7.19
GitCommit: 2bf793ef6dc9a18e00cb12efb64355c2c9d5eb41
runc:
Version: 1.7.19
GitCommit: v1.1.13-0-g58aa920
docker-init:
Version: 0.19.0
GitCommit: de40ad0

---

Testcase:

from testcontainers.postgres import PostgresContainer


def test_python_test_containers_4_11():
    in_container_port = 5432
    with PostgresContainer(
            image="postgres:15.5",
            port=in_container_port,
            username="test_user",
            password="test_pw",
            dbname="test_db",
    ) as postgres:

        db_params= {
            "dbname": postgres.dbname,
            "user": postgres.username,
            "password": postgres.password,
            "host": postgres.get_container_host_ip(),
            "port": postgres.get_exposed_port(in_container_port),
        }
        print(db_params)
        print(postgres.get_logs())

---

When I run this with any testcontainers version (4.10 or 4.11) I get:

docker.errors.DockerException: Error while fetching server API version: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

---

When I run this and add at the beginning:

    os.environ["TESTCONTAINERS_DOCKER_SOCKET_OVERRIDE"] = f"{str(Path.home())}/.colima/default/docker.sock"
    os.environ["DOCKER_HOST"] = f"unix://{str(Path.home())}/.colima/default/docker.sock"

then this works with 4.10

---

When I run this with the yanked 4.11 version, I get the API version error again with the following stack trace

=============================== 1 error in 0.27s ===============================

tests/seotter_tests/debug_test_containers_411.py:None (tests/seotter_tests/debug_test_containers_411.py)
../../.venv/lib/python3.12/site-packages/urllib3/connectionpool.py:787: in urlopen
    response = self._make_request(
../../.venv/lib/python3.12/site-packages/urllib3/connectionpool.py:493: in _make_request
    conn.request(
../../.venv/lib/python3.12/site-packages/urllib3/connection.py:494: in request
    self.endheaders()
/opt/homebrew/Cellar/python@3.12/3.12.10/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py:1333: in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
/opt/homebrew/Cellar/python@3.12/3.12.10/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py:1093: in _send_output
    self.send(msg)
/opt/homebrew/Cellar/python@3.12/3.12.10/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py:1037: in send
    self.connect()
../../.venv/lib/python3.12/site-packages/docker/transport/unixconn.py:26: in connect
    sock.connect(self.unix_socket)
E   FileNotFoundError: [Errno 2] No such file or directory

During handling of the above exception, another exception occurred:
../../.venv/lib/python3.12/site-packages/requests/adapters.py:667: in send
    resp = conn.urlopen(
../../.venv/lib/python3.12/site-packages/urllib3/connectionpool.py:841: in urlopen
    retries = retries.increment(
../../.venv/lib/python3.12/site-packages/urllib3/util/retry.py:474: in increment
    raise reraise(type(error), error, _stacktrace)
../../.venv/lib/python3.12/site-packages/urllib3/util/util.py:38: in reraise
    raise value.with_traceback(tb)
../../.venv/lib/python3.12/site-packages/urllib3/connectionpool.py:787: in urlopen
    response = self._make_request(
../../.venv/lib/python3.12/site-packages/urllib3/connectionpool.py:493: in _make_request
    conn.request(
../../.venv/lib/python3.12/site-packages/urllib3/connection.py:494: in request
    self.endheaders()
/opt/homebrew/Cellar/python@3.12/3.12.10/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py:1333: in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
/opt/homebrew/Cellar/python@3.12/3.12.10/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py:1093: in _send_output
    self.send(msg)
/opt/homebrew/Cellar/python@3.12/3.12.10/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py:1037: in send
    self.connect()
../../.venv/lib/python3.12/site-packages/docker/transport/unixconn.py:26: in connect
    sock.connect(self.unix_socket)
E   urllib3.exceptions.ProtocolError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

During handling of the above exception, another exception occurred:
../../.venv/lib/python3.12/site-packages/docker/api/client.py:223: in _retrieve_server_version
    return self.version(api_version=False)["ApiVersion"]
../../.venv/lib/python3.12/site-packages/docker/api/daemon.py:181: in version
    return self._result(self._get(url), json=True)
../../.venv/lib/python3.12/site-packages/docker/utils/decorators.py:44: in inner
    return f(self, *args, **kwargs)
../../.venv/lib/python3.12/site-packages/docker/api/client.py:246: in _get
    return self.get(url, **self._set_request_timeout(kwargs))
../../.venv/lib/python3.12/site-packages/requests/sessions.py:602: in get
    return self.request("GET", url, **kwargs)
../../.venv/lib/python3.12/site-packages/requests/sessions.py:589: in request
    resp = self.send(prep, **send_kwargs)
../../.venv/lib/python3.12/site-packages/requests/sessions.py:703: in send
    r = adapter.send(request, **kwargs)
../../.venv/lib/python3.12/site-packages/requests/adapters.py:682: in send
    raise ConnectionError(err, request=request)
E   requests.exceptions.ConnectionError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

The above exception was the direct cause of the following exception:
debug_test_containers_411.py:4: in <module>
    from testcontainers.postgres import PostgresContainer
../../.venv/lib/python3.12/site-packages/testcontainers/postgres/__init__.py:16: in <module>
    from testcontainers.core.generic import DbContainer
../../.venv/lib/python3.12/site-packages/testcontainers/core/generic.py:16: in <module>
    from testcontainers.core.container import DockerContainer
../../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:12: in <module>
    from testcontainers.core.config import ConnectionMode
../../.venv/lib/python3.12/site-packages/testcontainers/core/config.py:52: in <module>
    RYUK_DOCKER_SOCKET: str = get_docker_socket()
../../.venv/lib/python3.12/site-packages/testcontainers/core/config.py:36: in get_docker_socket
    client = docker.from_env()
../../.venv/lib/python3.12/site-packages/docker/client.py:94: in from_env
    return cls(
../../.venv/lib/python3.12/site-packages/docker/client.py:45: in __init__
    self.api = APIClient(*args, **kwargs)
../../.venv/lib/python3.12/site-packages/docker/api/client.py:207: in __init__
    self._version = self._retrieve_server_version()
../../.venv/lib/python3.12/site-packages/docker/api/client.py:230: in _retrieve_server_version
    raise DockerException(
E   docker.errors.DockerException: Error while fetching server API version: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))
ERROR: found no collectors for /Users/christian/seo/seotter/tests/seotter_tests/debug_test_containers_411.py::test_python_test_containers_4_11

</ details>

When I run this with the @fix/get_docker_socket-on-import version (and setting the two env vars), I get:

tests/seotter_tests/debug_test_containers_411.py:6 (test_python_test_containers_4_11)
../../.venv/lib/python3.12/site-packages/docker/api/client.py:275: in _raise_for_status
    response.raise_for_status()
../../.venv/lib/python3.12/site-packages/requests/models.py:1026: in raise_for_status
    raise HTTPError(http_error_msg, response=self)
E   requests.exceptions.HTTPError: 404 Client Error: Not Found for url: http+docker://localhost/v1.46/containers/3d2f2f0dc57ed62a9239503a45c304d7d7a9eed023b9fe22d193bfe12bd7cc4d/json

The above exception was the direct cause of the following exception:
debug_test_containers_411.py:11: in test_python_test_containers_4_11
    with PostgresContainer(
../../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:197: in __enter__
    return self.start()
../../.venv/lib/python3.12/site-packages/testcontainers/core/generic.py:74: in start
    super().start()
../../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:160: in start
    Reaper.get_instance()
../../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:263: in get_instance
    Reaper._instance = Reaper._create_instance()
../../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:294: in _create_instance
    wait_for_logs(Reaper._container, r".* Started!", timeout=20, raise_on_exit=True)
../../.venv/lib/python3.12/site-packages/testcontainers/core/waiting_utils.py:113: in wait_for_logs
    stdout, stderr = container.get_logs()
../../.venv/lib/python3.12/site-packages/testcontainers/core/container.py:243: in get_logs
    return self._container.logs(stderr=False), self._container.logs(stdout=False)
../../.venv/lib/python3.12/site-packages/docker/models/containers.py:322: in logs
    return self.client.api.logs(self.id, **kwargs)
../../.venv/lib/python3.12/site-packages/docker/utils/decorators.py:19: in wrapped
    return f(self, resource_id, *args, **kwargs)
../../.venv/lib/python3.12/site-packages/docker/api/container.py:896: in logs
    output = self._get_result(container, stream, res)
../../.venv/lib/python3.12/site-packages/docker/api/client.py:483: in _get_result
    return self._get_result_tty(stream, res, self._check_is_tty(container))
../../.venv/lib/python3.12/site-packages/docker/utils/decorators.py:19: in wrapped
    return f(self, resource_id, *args, **kwargs)
../../.venv/lib/python3.12/site-packages/docker/api/client.py:479: in _check_is_tty
    cont = self.inspect_container(container)
../../.venv/lib/python3.12/site-packages/docker/utils/decorators.py:19: in wrapped
    return f(self, resource_id, *args, **kwargs)
../../.venv/lib/python3.12/site-packages/docker/api/container.py:793: in inspect_container
    return self._result(
../../.venv/lib/python3.12/site-packages/docker/api/client.py:281: in _result
    self._raise_for_status(response)
../../.venv/lib/python3.12/site-packages/docker/api/client.py:277: in _raise_for_status
    raise create_api_error_from_http_exception(e) from e
../../.venv/lib/python3.12/site-packages/docker/errors.py:39: in create_api_error_from_http_exception
    raise cls(e, response=response, explanation=explanation) from e
E   docker.errors.NotFound: 404 Client Error for http+docker://localhost/v1.46/containers/3d2f2f0dc57ed62a9239503a45c304d7d7a9eed023b9fe22d193bfe12bd7cc4d/json: Not Found ("No such container: 3d2f2f0dc57ed62a9239503a45c304d7d7a9eed023b9fe22d193bfe12bd7cc4d")

When I run this with the @fix/get_docker_socket-on-import version and don't set any env vars, I get the API error again.
When I run

    print(testcontainers_config.ryuk_docker_socket)
    print(get_docker_socket())

with or without env vars I get the same API or 404 errors

[alexanderankin]

See if #833 fixes it for you