Byron · Nov 4, 2026 · Nov 3, 2026 · Nov 4, 2026
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -77,6 +77,17 @@ Deletions and renames that exercise library behavior or prepare a fixture for
 reuse must remain strict. If a cached fixture cannot be cleaned up, rebuild it
 at a fresh location before handing it to another test.
 
+## Network-dependent tests
+
+Mark tests that use the network with `pytest.mark.net`, including tests whose
+fixtures start a local Git daemon or download packages. This includes binding,
+listening on, and connecting to loopback sockets, not just internet access.
+Network-restricted package builders, such as SUSE and openSUSE build servers, can
+exclude these tests with `pytest -m 'not net'` after installing test dependencies.
+If only some parameters use the network, mark those with
+`pytest.param(..., marks=pytest.mark.net)` so the other cases still run. Local
+filesystem clones and mocked network calls do not need this marker.
+
 ## Fuzzing Test Specific Documentation
 
 For details related to contributing to the fuzzing test suite and OSS-Fuzz integration, please 

diff --git a/pyproject.toml b/pyproject.toml
@@ -6,8 +6,8 @@ build-backend = "setuptools.build_meta"
 name = "GitPython"
 description = "GitPython is a Python library used to interact with Git repositories"
 authors = [
-    {name = "Sebastian Thiel", email = "byronimo@gmail.com"},
-    {name = "Michael Trier", email = "mtrier@gmail.com"},
+    { name = "Sebastian Thiel", email = "byronimo@gmail.com" },
+    { name = "Michael Trier", email = "mtrier@gmail.com" },
 ]
 readme = "README.md"
 requires-python = ">=3.8"
@@ -51,10 +51,10 @@ doc = [
 include-package-data = true
 
 [tool.setuptools.dynamic]
-version = {file = "VERSION"}
-dependencies = {file = "requirements.txt"}
-optional-dependencies."test" = {file = "test-requirements.txt"}
-optional-dependencies."gix" = {file = "gix-requirements.txt"}
+version = { file = "VERSION" }
+dependencies = { file = "requirements.txt" }
+optional-dependencies."test" = { file = "test-requirements.txt" }
+optional-dependencies."gix" = { file = "gix-requirements.txt" }
 
 [tool.setuptools.packages.find]
 include = ["git", "git.*"]
@@ -64,7 +64,7 @@ addopts = "--cov=git --cov-report=term -rfEX"
 filterwarnings = "ignore::DeprecationWarning"
 python_files = "test_*.py"
 tmp_path_retention_policy = "failed"
-testpaths = "test"  # Space separated list of paths from root e.g test tests doc/testing.
+testpaths = "test"                            # Space separated list of paths from root e.g test tests doc/testing.
 # --cov   coverage
 # --cov-report term  # send report to terminal term-missing -> terminal with line numbers  html  xml
 # --cov-report term-missing # to terminal with line numbers
@@ -74,6 +74,9 @@ testpaths = "test"  # Space separated list of paths from root e.g test tests doc
 # -ra   # test summary: list all non-passing (fail, error, skip, xfail, xpass)
 # --ignore-glob=**/gitdb/*  # ignore glob paths
 # filterwarnings ignore::WarningType  # ignores those warnings
+markers = [
+    "net: tests requiring network access, including local/loopback sockets; skip with -m 'not net' on network-restricted builders",
+]
 
 [tool.mypy]
 files = ["git/", "test/test_typing.py", "test/test_remote_progress.py"]
@@ -100,14 +103,8 @@ include = [
     "test/test_git.py",
     "test/test_remote_progress.py",
 ]
-extraPaths = [
-    "gitdb",
-    "smmap",
-]
-exclude = [
-    "gitdb",
-    "smmap",
-]
+extraPaths = ["gitdb", "smmap"]
+exclude = ["gitdb", "smmap"]
 
 [tool.coverage.run]
 source = ["git"]
@@ -119,39 +116,33 @@ omit = ["*/git/ext/*"]
 [tool.ruff]
 line-length = 120
 # Exclude a variety of commonly ignored directories.
-exclude = [
-    "git/ext/",
-    "gitdb/",
-    "smmap/",
-    "build",
-    "dist",
-]
+exclude = ["git/ext/", "gitdb/", "smmap/", "build", "dist"]
 # Enable Pyflakes `E` and `F` codes by default.
 lint.select = [
     "E",
-    "W",     # See: https://pypi.org/project/pycodestyle
-    "F",     # See: https://pypi.org/project/pyflakes
+    "W", # See: https://pypi.org/project/pycodestyle
+    "F", # See: https://pypi.org/project/pyflakes
     # "I",   # See: https://pypi.org/project/isort/
     # "S",   # See: https://pypi.org/project/flake8-bandit
     # "UP",  # See: https://docs.astral.sh/ruff/rules/#pyupgrade-up
 ]
 lint.extend-select = [
     # "A",    # See: https://pypi.org/project/flake8-builtins
-    "B",      # See: https://pypi.org/project/flake8-bugbear
-    "C4",     # See: https://pypi.org/project/flake8-comprehensions
-    "TC004",  # See: https://docs.astral.sh/ruff/rules/runtime-import-in-type-checking-block/
+    "B",     # See: https://pypi.org/project/flake8-bugbear
+    "C4",    # See: https://pypi.org/project/flake8-comprehensions
+    "TC004", # See: https://docs.astral.sh/ruff/rules/runtime-import-in-type-checking-block/
 ]
 lint.ignore = [
     # If it becomes necessary to ignore any rules, list them here.
 ]
 lint.unfixable = [
-    "F401",  # Module imported but unused
+    "F401", # Module imported but unused
 ]
 
 [tool.ruff.lint.per-file-ignores]
 "test/**" = [
-    "B018",  # useless-expression
+    "B018", # useless-expression
 ]
 "fuzzing/fuzz-targets/**" = [
-  "E402",  # environment setup must happen before the `git` module is imported, thus cannot happen at top of file
+    "E402", # environment setup must happen before the `git` module is imported, thus cannot happen at top of file
 ]
diff --git a/test/test_base.py b/test/test_base.py
@@ -4,21 +4,22 @@
 # 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
 
 import gc
-from io import BytesIO
 import os.path as osp
 import sys
+from io import BytesIO
 from unittest import skipIf
 from unittest.mock import patch
 
-from gitdb import OInfo
+import pytest
 
+import git.objects.base as base
 from git import Repo
 from git.objects import Blob, Commit, TagObject, Tree
-import git.objects.base as base
 from git.objects.util import get_object_type_by_name
 from git.util import hex_to_bin
-
-from test.lib import TestBase as _TestBase, with_rw_and_rw_remote_repo, with_rw_repo
+from gitdb import OInfo
+from test.lib import TestBase as _TestBase
+from test.lib import with_rw_and_rw_remote_repo, with_rw_repo
 from test.lib.fixtures import fixture_repo, writable_fixture
 
 
@@ -122,6 +123,7 @@ def test_with_rw_repo(self, rw_repo: Repo):
         assert osp.isdir(osp.join(rw_repo.working_tree_dir, "lib"))
         assert osp.isdir(rw_repo.working_dir)
 
+    @pytest.mark.net
     @skipIf(sys.platform == "win32", "FIXME: Freezes!  sometimes...")
     @with_rw_and_rw_remote_repo("0.1.6")
     def test_with_rw_remote_and_rw_repo(self, rw_repo, rw_remote_repo):

diff --git a/test/test_cleanup.py b/test/test_cleanup.py
@@ -3,26 +3,25 @@
 
 """Cleanup failures must not fail, skip, or hide the result of a test."""
 
-from contextlib import nullcontext, suppress
 import errno
 import gc
 import os
-from pathlib import Path
 import socket
 import sys
-from types import SimpleNamespace
 import weakref
+from contextlib import nullcontext, suppress
+from pathlib import Path
+from types import SimpleNamespace
 
 import pytest
 
 from git import Repo
 from git.util import rmtree
 from test import cleanup
 from test.cleanup import TemporaryDirectory, cleanup_directory
-from test.lib import requires_symlinks, with_rw_and_rw_remote_repo, with_rw_directory, with_rw_repo
-from test.lib.helper import git_daemon_launched
+from test.lib import fixtures, requires_symlinks, with_rw_and_rw_remote_repo, with_rw_directory, with_rw_repo
 from test.lib.fixtures import fixture_repo, writable_fixture
-from test.lib import fixtures
+from test.lib.helper import git_daemon_launched
 
 
 @pytest.fixture
@@ -183,6 +182,7 @@ def source_repo():
         yield repo
 
 
+@pytest.mark.net
 def test_git_daemon_releases_port_and_can_restart(tmp_path):
     with socket.socket() as listener:
         listener.bind(("127.0.0.1", 0))
@@ -202,7 +202,14 @@ def test_git_daemon_releases_port_and_can_restart(tmp_path):
                 pass
 
 
-@pytest.mark.parametrize("decorator", [with_rw_directory, with_rw_repo("HEAD"), with_rw_and_rw_remote_repo("HEAD")])
+@pytest.mark.parametrize(
+    "decorator",
+    [
+        with_rw_directory,
+        with_rw_repo("HEAD"),
+        pytest.param(with_rw_and_rw_remote_repo("HEAD"), marks=pytest.mark.net),
+    ],
+)
 def test_decorators_preserve_success_with_locked_cleanup(source_repo, tmp_path, monkeypatch, locked_file, decorator):
     monkeypatch.setattr(cleanup.tempfile, "tempdir", str(tmp_path))
     directories = []

diff --git a/test/test_clone.py b/test/test_clone.py
@@ -4,21 +4,18 @@
 import os
 import os.path as osp
 import pathlib
+import re
 import sys
-from unittest import skip
-from unittest import mock
+from pathlib import Path
+from unittest import mock, skip
+
+import pytest
 
+import git
 from git import Git, GitCommandError, Repo
 from git.exc import UnsafeOptionError, UnsafeProtocolError
-
+from test.lib import PathLikeMock, TestBase, with_rw_directory, with_rw_repo
 from test.lib.fixtures import writable_fixture
-from test.lib import TestBase, with_rw_directory, with_rw_repo, PathLikeMock
-
-from pathlib import Path
-import re
-
-import git
-import pytest
 
 
 @pytest.fixture
@@ -145,6 +142,7 @@ def test_clone_from_with_path_contains_unicode(self):
             except UnicodeEncodeError:
                 self.fail("Raised UnicodeEncodeError")
 
+    @pytest.mark.net
     @with_rw_directory
     @skip(
         """The referenced repository was removed, and one needs to set up a new

diff --git a/test/test_installation.py b/test/test_installation.py
@@ -7,12 +7,15 @@
 import subprocess
 import sys
 
+import pytest
+
 from git import __version__, _backend
 from test.lib import TestCase, requires_symlinks
 from test.lib.fixtures import ROOT, writable_fixture
 
 
 class TestInstallation(TestCase):
+    @pytest.mark.net
     @requires_symlinks
     def test_installation(self):
         # Virtualenv executables and its source symlink need their final location.

diff --git a/test/test_remote.py b/test/test_remote.py
@@ -6,13 +6,13 @@
 import gc
 import os
 import os.path as osp
-from pathlib import Path
 import random
 import socket
 import sys
 import tempfile
 import threading
 import time
+from pathlib import Path
 from unittest import mock, skipIf
 
 import pytest
@@ -34,14 +34,14 @@
 from git.exc import UnsafeOptionError, UnsafeProtocolError
 from git.util import IterableList
 from test.cleanup import cleanup_directory
-from test.lib.fixtures import fixture_repo, writable_fixture
 from test.lib import (
     GIT_DAEMON_PORT,
     TestBase,
     fixture,
     with_rw_and_rw_remote_repo,
     with_rw_repo,
 )
+from test.lib.fixtures import fixture_repo, writable_fixture
 
 # Make sure we have repeatable results.
 random.seed(0)
@@ -441,6 +441,7 @@ def _assert_push_and_pull(self, remote, rw_repo, remote_repo):
         TagReference.delete(rw_repo, new_tag, other_tag)
         remote.push(":%s" % other_tag.path, kill_after_timeout=10.0)
 
+    @pytest.mark.net
     @skipIf(sys.platform == "win32", "FIXME: Freezes!")
     @with_rw_and_rw_remote_repo("0.1.6")
     def test_base(self, rw_repo, remote_repo):
@@ -1031,6 +1032,7 @@ def test_ls_remote_unsafe_options_allowed(self, rw_repo):
                 with self.assertRaises(GitCommandError):
                     rw_repo.git.ls_remote(".", **unsafe_option, allow_unsafe_options=True)
 
+    @pytest.mark.net
     @with_rw_and_rw_remote_repo("0.1.6")
     def test_fetch_unsafe_branch_name(self, rw_repo, remote_repo):
         # Create branch with a name containing a NBSP
@@ -1048,6 +1050,7 @@ def test_fetch_unsafe_branch_name(self, rw_repo, remote_repo):
         Head.delete(remote_repo, bad_branch_name)
 
 
+@pytest.mark.net
 @pytest.mark.skipif(sys.platform == "win32", reason="kill_after_timeout is not supported on Windows")
 @pytest.mark.parametrize("protocol", ["git", "http", "https"])
 @pytest.mark.parametrize("operation", ["fetch", "pull", "push"])