diff --git a/taskcluster/config.yml b/taskcluster/config.yml
index 4e47debc8..d9d32aac2 100644
--- a/taskcluster/config.yml
+++ b/taskcluster/config.yml
@@ -38,3 +38,8 @@ workers:
             implementation: docker-worker
             os: linux
             worker-type: linux-docker
+        t-windows:
+            provisioner: 'taskgraph-t'
+            implementation: generic-worker
+            os: windows
+            worker-type: win11-64-24h2
diff --git a/taskcluster/kinds/test/kind.yml b/taskcluster/kinds/test/kind.yml
index a0833dbda..95adbfc76 100644
--- a/taskcluster/kinds/test/kind.yml
+++ b/taskcluster/kinds/test/kind.yml
@@ -18,18 +18,14 @@ task-defaults:
         artifact_prefix: public
         retrigger: true
         code-review: true
-    worker-type: t-linux
     worker:
-        docker-image: {in-tree: python}
         max-run-time: 1800
         env:
-            LC_ALL: "C"
             PYTHONUTF8: "0"
             PYTHONCOERCECLOCALE: "0"
             HGENCODING: "utf-8"
     treeherder:
         kind: test
-        platform: test/opt
         tier: 1
     run:
         using: run-task
@@ -37,23 +33,44 @@ task-defaults:
         use-caches: [checkout, uv]
 
 tasks:
-    unit:
-        description: "Run unit tests with py{matrix[python]}"
+    unit-linux:
+        description: "Run unit tests with py{matrix[python]} on Linux"
         matrix:
             set-name: "unit-py{matrix[python]}"
             substitution-fields: [description, run.command, treeherder, worker, attributes]
             python: ["314t", "314", "313", "312", "311", "310", "39"]
         attributes:
             python: "{matrix[python]}"
+            platform: linux
+        worker-type: t-linux
         worker:
+            docker-image: {in-tree: python}
             artifacts:
                 - type: file
                   path: "/builds/worker/artifacts/coverage"
                   name: "public/coverage.py{matrix[python]}"
             env:
+                LC_ALL: "C"
                 UV_PYTHON: "{matrix[python]}"
         treeherder:
+            platform: test-linux/opt
             symbol: unit(py{matrix[python]})
         run:
             command: >-
                 uv run coverage run --data-file /builds/worker/artifacts/coverage --context=py{matrix[python]} -m pytest -vv
+
+    unit-win:
+        description: "Run unit tests with python on Windows"
+        attributes:
+            platform: windows
+        worker-type: t-windows
+        worker:
+            taskcluster-proxy: true
+        treeherder:
+            platform: test-win/opt
+            symbol: unit(py)
+        run:
+            command: >-
+                python3 -V &&
+                powershell -ExecutionPolicy ByPass -c 'irm https://astral.sh/uv/install.ps1 | iex' &&
+                ~/.local/bin/uv.exe run -m pytest -vv
diff --git a/test/conftest.py b/test/conftest.py
index 3e0714e0b..0a3dcb693 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -1,4 +1,5 @@
 import os
+import platform
 from pathlib import Path
 
 import pytest
@@ -16,6 +17,12 @@
 # no way to ignore ~/.gitconfig other than overriding $HOME, which is overkill.
 os.environ["GIT_CONFIG_NOSYSTEM"] = "1"
 
+# Some of the tests marked with this may be fixable on Windows; we should
+# look into these in more depth at some point.
+nowin = pytest.mark.skipif(
+    platform.system() == "Windows", reason="test currently broken on Windows"
+)
+
 
 @pytest.fixture
 def responses():
diff --git a/test/test_config.py b/test/test_config.py
index 4392e35ba..9a2e941a0 100644
--- a/test/test_config.py
+++ b/test/test_config.py
@@ -10,6 +10,8 @@
 
 from taskgraph.config import GraphConfig
 
+from .conftest import nowin
+
 
 def test_graph_config_basic():
     graph_config = GraphConfig({"foo": "bar"}, "root")
@@ -50,6 +52,7 @@ def test_vcs_root_with_non_standard_dir():
         assert vcs_root == expected_path
 
 
+@nowin
 def test_vcs_root_fallback(mocker):
     mocker.patch("os.getcwd", return_value="/path/to/repo")
 
diff --git a/test/test_docker.py b/test/test_docker.py
index 2e4003c45..c75957bbf 100644
--- a/test/test_docker.py
+++ b/test/test_docker.py
@@ -10,6 +10,8 @@
 from taskgraph.transforms.docker_image import IMAGE_BUILDER_IMAGE
 from taskgraph.util.vcs import get_repository
 
+from .conftest import nowin
+
 
 @pytest.fixture
 def root_url():
@@ -112,6 +114,7 @@ def test_load_task_invalid_task(run_load_task):
     assert run_load_task(task)[0] == 1
 
 
+@nowin
 def test_load_task(run_load_task):
     image_task_id = "def"
     task = {
@@ -172,6 +175,7 @@ def test_load_task(run_load_task):
             assert exp == actual[i]
 
 
+@nowin
 def test_load_task_env_init_and_remove(mocker, run_load_task):
     # Mock NamedTemporaryFile to capture what's written to it
     mock_envfile = mocker.MagicMock()
@@ -252,6 +256,7 @@ def test_load_task_env_init_and_remove(mocker, run_load_task):
     assert actual[6:8] == ["-v", "/tmp/test_initfile:/builds/worker/.bashrc"]
 
 
+@nowin
 @pytest.mark.parametrize(
     "image",
     [
@@ -292,6 +297,7 @@ def test_load_task_with_different_image_types(
     mocks["load_image_by_task_id"].assert_called_once_with(image_task_id)
 
 
+@nowin
 def test_load_task_with_local_image(
     mocker,
     run_load_task,
@@ -322,6 +328,7 @@ def test_load_task_with_local_image(
     assert mocks["build_image"].call_args[0][1] == "hello-world"
 
 
+@nowin
 def test_load_task_with_unsupported_image_type(caplog, run_load_task):
     caplog.set_level(logging.DEBUG)
     task = {
@@ -343,6 +350,7 @@ def test_load_task_with_unsupported_image_type(caplog, run_load_task):
     assert "Tasks with unsupported-type images are not supported!" in caplog.text
 
 
+@nowin
 def test_load_task_with_task_definition(run_load_task, caplog):
     # Test passing a task definition directly instead of a task ID
     caplog.set_level(logging.INFO)
@@ -372,6 +380,7 @@ def test_load_task_with_task_definition(run_load_task, caplog):
     assert "Loading 'test-task-direct' from provided definition" in caplog.text
 
 
+@nowin
 def test_load_task_with_interactive_false(run_load_task):
     # Test non-interactive mode that doesn't require run-task
     # Task that doesn't use run-task (would fail in interactive mode)
@@ -427,6 +436,7 @@ def task():
     }
 
 
+@nowin
 def test_load_task_with_custom_image_in_tree(run_load_task, task):
     image = "hello-world"
     ret, mocks = run_load_task(task, custom_image=image)
@@ -453,6 +463,7 @@ def test_load_task_with_custom_image_in_tree(run_load_task, task):
     assert tag == f"taskcluster/{image}:latest"
 
 
+@nowin
 def test_load_task_with_custom_image_task_id(run_load_task, task):
     image = "task-id=abc"
     ret, mocks = run_load_task(task, custom_image=image)
@@ -460,6 +471,7 @@ def test_load_task_with_custom_image_task_id(run_load_task, task):
     mocks["load_image_by_task_id"].assert_called_once_with("abc")
 
 
+@nowin
 def test_load_task_with_custom_image_index(mocker, run_load_task, task):
     image = "index=abc"
     mocker.patch.object(docker, "find_task_id", return_value="abc")
@@ -468,6 +480,7 @@ def test_load_task_with_custom_image_index(mocker, run_load_task, task):
     mocks["load_image_by_task_id"].assert_called_once_with("abc")
 
 
+@nowin
 def test_load_task_with_custom_image_registry(mocker, run_load_task, task):
     image = "ubuntu:latest"
     ret, mocks = run_load_task(task, custom_image=image)
@@ -476,6 +489,7 @@ def test_load_task_with_custom_image_registry(mocker, run_load_task, task):
     assert not mocks["build_image"].called
 
 
+@nowin
 def test_load_task_with_develop(mocker, run_load_task, task):
     repo_name = "foo"
     repo_path = "/workdir/vcs"
@@ -623,6 +637,7 @@ def mock_path_constructor(path_arg):
     return inner
 
 
+@nowin
 def test_build_image(run_build_image):
     # Test building image without save_image
     result, mocks = run_build_image("hello-world")
@@ -654,6 +669,7 @@ def test_build_image(run_build_image):
     assert result == "hello-world:latest"
 
 
+@nowin
 def test_build_image_with_parent(mocker, responses, root_url, run_build_image):
     parent_task_id = "abc"
     responses.get(f"{root_url}/api/queue/v1/task/{parent_task_id}/status")
@@ -687,6 +703,7 @@ def test_build_image_with_parent(mocker, responses, root_url, run_build_image):
     assert docker_load_args[:3] == ["docker", "load", "-i"]
 
 
+@nowin
 def test_build_image_with_parent_not_found(
     mocker, responses, root_url, run_build_image
 ):
@@ -725,6 +742,7 @@ def test_build_image_with_parent_not_found(
     assert docker_load_args[:3] == ["docker", "load", "-i"]
 
 
+@nowin
 def test_build_image_with_save_image(run_build_image):
     save_path = "/path/to/save.tar"
 
@@ -741,6 +759,7 @@ def test_build_image_with_save_image(run_build_image):
     assert save_path in str(result)
 
 
+@nowin
 def test_build_image_context_only(run_build_image):
     context_path = "/path/to/context.tar"
 
diff --git a/test/test_scripts_run_task.py b/test/test_scripts_run_task.py
index 933e7b2e3..83fd4e7b7 100644
--- a/test/test_scripts_run_task.py
+++ b/test/test_scripts_run_task.py
@@ -15,6 +15,8 @@
 import taskgraph
 from taskgraph.util.caches import CACHES
 
+from .conftest import nowin
+
 
 @pytest.fixture(scope="module")
 def run_task_mod():
@@ -617,6 +619,7 @@ def inner(extra_args=None, env=None):
     return inner
 
 
+@nowin
 def test_main_abspath_environment(mocker, run_main):
     envvars = ["GECKO_PATH", "MOZ_FETCHES_DIR", "UPLOAD_DIR"]
     envvars += [cache["env"] for cache in CACHES.values() if "env" in cache]
diff --git a/test/test_transforms_run_toolchain.py b/test/test_transforms_run_toolchain.py
index 3ec843dff..46554ea00 100644
--- a/test/test_transforms_run_toolchain.py
+++ b/test/test_transforms_run_toolchain.py
@@ -11,6 +11,8 @@
 from taskgraph.util.templates import merge
 from taskgraph.util.vcs import GitRepository
 
+from .conftest import nowin
+
 TASK_DEFAULTS = {
     "description": "fake description",
     "label": "fake-task-label",
@@ -205,6 +207,7 @@ def assert_relative_script(task, taskdesc):
     assert_docker_worker(task, taskdesc)
 
 
+@nowin
 @pytest.mark.parametrize(
     "task",
     (
diff --git a/test/test_util_archive.py b/test/test_util_archive.py
index ee256214b..6b1998a2e 100644
--- a/test/test_util_archive.py
+++ b/test/test_util_archive.py
@@ -15,6 +15,8 @@
     create_tar_gz_from_files,
 )
 
+from .conftest import nowin
+
 MODE_STANDARD = stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH
 
 
@@ -72,6 +74,7 @@ def test_dirs_refused(tmp_path):
             create_tar_from_files(fh, {"test": str(tmp_path)})
 
 
+@nowin
 def test_setuid_setgid_refused(tmp_path):
     uid = tmp_path / "setuid"
     uid.touch()
@@ -89,6 +92,7 @@ def test_setuid_setgid_refused(tmp_path):
             create_tar_from_files(fh, {"test": str(gid)})
 
 
+@nowin
 def test_create_tar_basic(tmp_path, create_files):
     files = create_files()
 
@@ -103,6 +107,7 @@ def test_create_tar_basic(tmp_path, create_files):
         verify_basic_tarfile(tf)
 
 
+@nowin
 def test_executable_preserved(tmp_path):
     p = tmp_path / "exec"
     p.write_bytes(b"#!/bin/bash\n")
@@ -129,6 +134,7 @@ def test_executable_preserved(tmp_path):
         assert extracted_content == b"#!/bin/bash\n"
 
 
+@nowin
 def test_create_tar_gz_basic(tmp_path, create_files):
     gp = tmp_path / "test.tar.gz"
     with open(gp, "wb") as fh:
@@ -156,6 +162,7 @@ def test_create_tar_gz_basic(tmp_path, create_files):
         verify_basic_tarfile(tf)
 
 
+@nowin
 def test_tar_gz_name(tmp_path, create_files):
     gp = tmp_path / "test.tar.gz"
     with open(gp, "wb") as fh:
diff --git a/test/test_util_docker.py b/test/test_util_docker.py
index f140b1668..98ad607cd 100644
--- a/test/test_util_docker.py
+++ b/test/test_util_docker.py
@@ -17,6 +17,7 @@
 from taskgraph.config import GraphConfig
 from taskgraph.util import docker
 
+from .conftest import nowin
 from .mockedopen import MockedOpen
 
 MODE_STANDARD = stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH
@@ -24,6 +25,7 @@
 
 @mock.patch.dict("os.environ", {"TASKCLUSTER_ROOT_URL": liburls.test_root_url()})
 class TestDocker(unittest.TestCase):
+    @nowin
     def test_generate_context_hash(self):
         tmpdir = tempfile.mkdtemp()
         try:
@@ -45,6 +47,7 @@ def test_generate_context_hash(self):
         finally:
             shutil.rmtree(tmpdir)
 
+    @nowin
     def test_docker_image_explicit_registry(self):
         files = {}
         files[f"{docker.IMAGE_DIR}/myimage/REGISTRY"] = "cool-images"
@@ -55,6 +58,7 @@ def test_docker_image_explicit_registry(self):
                 docker.docker_image("myimage"), "cool-images/myimage@sha256:434..."
             )
 
+    @nowin
     def test_docker_image_explicit_registry_by_tag(self):
         files = {}
         files[f"{docker.IMAGE_DIR}/myimage/REGISTRY"] = "myreg"
@@ -65,6 +69,7 @@ def test_docker_image_explicit_registry_by_tag(self):
                 docker.docker_image("myimage", by_tag=True), "myreg/myimage:1.2.3"
             )
 
+    @nowin
     def test_docker_image_default_registry(self):
         files = {}
         files[f"{docker.IMAGE_DIR}/REGISTRY"] = "mozilla"
@@ -75,6 +80,7 @@ def test_docker_image_default_registry(self):
                 docker.docker_image("myimage"), "mozilla/myimage@sha256:434..."
             )
 
+    @nowin
     def test_docker_image_default_registry_by_tag(self):
         files = {}
         files[f"{docker.IMAGE_DIR}/REGISTRY"] = "mozilla"
@@ -85,6 +91,7 @@ def test_docker_image_default_registry_by_tag(self):
                 docker.docker_image("myimage", by_tag=True), "mozilla/myimage:1.2.3"
             )
 
+    @nowin
     def test_create_context_tar_basic(self):
         tmp = tempfile.mkdtemp()
         try:
@@ -116,6 +123,7 @@ def test_create_context_tar_basic(self):
         finally:
             shutil.rmtree(tmp)
 
+    @nowin
     def test_create_context_topsrcdir_files(self):
         tmp = tempfile.mkdtemp()
         try:
@@ -148,6 +156,7 @@ def test_create_context_topsrcdir_files(self):
         finally:
             shutil.rmtree(tmp)
 
+    @nowin
     def test_create_context_absolute_path(self):
         tmp = tempfile.mkdtemp()
         try:
@@ -163,6 +172,7 @@ def test_create_context_absolute_path(self):
         finally:
             shutil.rmtree(tmp)
 
+    @nowin
     def test_create_context_outside_topsrcdir(self):
         tmp = tempfile.mkdtemp()
         try:
@@ -177,6 +187,7 @@ def test_create_context_outside_topsrcdir(self):
         finally:
             shutil.rmtree(tmp)
 
+    @nowin
     def test_create_context_missing_extra(self):
         tmp = tempfile.mkdtemp()
         try:
@@ -191,6 +202,7 @@ def test_create_context_missing_extra(self):
         finally:
             shutil.rmtree(tmp)
 
+    @nowin
     def test_create_context_extra_directory(self):
         tmp = tempfile.mkdtemp()
         try:
@@ -235,6 +247,7 @@ def test_create_context_extra_directory(self):
         finally:
             shutil.rmtree(tmp)
 
+    @nowin
     def test_stream_context_tar(self):
         tmp = tempfile.mkdtemp()
         try:
@@ -271,6 +284,7 @@ def test_stream_context_tar(self):
         finally:
             shutil.rmtree(tmp)
 
+    @nowin
     def test_image_paths_with_custom_kind(self):
         """Test image_paths function with graph_config parameter."""
         temp_dir = tempfile.mkdtemp()
@@ -309,6 +323,7 @@ def test_image_paths_with_custom_kind(self):
         finally:
             shutil.rmtree(temp_dir)
 
+    @nowin
     def test_parse_volumes_with_graph_config(self):
         """Test parse_volumes function with graph_config parameter."""
         temp_dir = tempfile.mkdtemp()
diff --git a/test/test_util_vcs.py b/test/test_util_vcs.py
index 2e2327342..e68821bce 100644
--- a/test/test_util_vcs.py
+++ b/test/test_util_vcs.py
@@ -11,6 +11,8 @@
 
 from taskgraph.util.vcs import HgRepository, Repository, get_repository
 
+from .conftest import nowin
+
 
 def test_get_repository(repo):
     r = get_repository(repo.path)
@@ -215,6 +217,7 @@ def assert_files(actual, expected):
     assert set(actual) == set(expected)
 
 
+@nowin
 def test_get_tracked_files(repo):
     assert_files(repo.get_tracked_files(), ["first_file"])
 
@@ -370,6 +373,7 @@ def test_get_changed_files_two_revisions(repo):
     )
 
 
+@nowin
 def test_workdir_outgoing(repo_with_upstream):
     repo, upstream_location = repo_with_upstream