diff --git a/pyproject.toml b/pyproject.toml
index 73385b895..d70f8d421 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,6 +51,7 @@ dev = [
   "sphinx-taskgraph",
   "sphinxcontrib-mermaid",
   "zstandard",
+  "pytest-xdist>=3.6.1",
 ]
 
 [project.optional-dependencies]
diff --git a/taskcluster/kinds/test/kind.yml b/taskcluster/kinds/test/kind.yml
index 8118e078a..b337bd9b0 100644
--- a/taskcluster/kinds/test/kind.yml
+++ b/taskcluster/kinds/test/kind.yml
@@ -54,4 +54,4 @@ tasks:
             symbol: unit(py{matrix[python]})
         run:
             command: >-
-                uv run coverage run --data-file /builds/worker/artifacts/coverage --context=py{matrix[python]} -m pytest -vv
+                uv run coverage run --data-file /builds/worker/artifacts/coverage --context=py{matrix[python]} -m pytest -n auto -vv
diff --git a/uv.lock b/uv.lock
index 7da769b14..2b94812dd 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1005,6 +1005,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/36/f4/c6e662dade71f56cd2f3735141b265c3c79293c109549c1e6933b0651ffc/exceptiongroup-1.3.0-py3-none-any.whl", hash = "sha256:4d111e6e0c13d0644cad6ddaa7ed0261a0b36971f6d23e7ec9b4b9097da78a10", size = 16674, upload-time = "2025-05-10T17:42:49.33Z" },
 ]
 
+[[package]]
+name = "execnet"
+version = "2.1.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/bb/ff/b4c0dc78fbe20c3e59c0c7334de0c27eb4001a2b2017999af398bf730817/execnet-2.1.1.tar.gz", hash = "sha256:5189b52c6121c24feae288166ab41b32549c7e2348652736540b9e6e7d4e72e3", size = 166524, upload-time = "2024-04-08T09:04:19.245Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/43/09/2aea36ff60d16dd8879bdb2f5b3ee0ba8d08cbbdcdfe870e695ce3784385/execnet-2.1.1-py3-none-any.whl", hash = "sha256:26dee51f1b80cebd6d0ca8e74dd8745419761d3bef34163928cbebbdc4749fdc", size = 40612, upload-time = "2024-04-08T09:04:17.414Z" },
+]
+
 [[package]]
 name = "filelock"
 version = "3.16.1"
@@ -2615,6 +2624,40 @@ requires-dist = [
     { name = "taskcluster-taskgraph", editable = "." },
 ]
 
+[[package]]
+name = "pytest-xdist"
+version = "3.6.1"
+source = { registry = "https://pypi.org/simple" }
+resolution-markers = [
+    "python_full_version < '3.9'",
+]
+dependencies = [
+    { name = "execnet", marker = "python_full_version < '3.9'" },
+    { name = "pytest", version = "8.3.5", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.9'" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/41/c4/3c310a19bc1f1e9ef50075582652673ef2bfc8cd62afef9585683821902f/pytest_xdist-3.6.1.tar.gz", hash = "sha256:ead156a4db231eec769737f57668ef58a2084a34b2e55c4a8fa20d861107300d", size = 84060, upload-time = "2024-04-28T19:29:54.414Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/6d/82/1d96bf03ee4c0fdc3c0cbe61470070e659ca78dc0086fb88b66c185e2449/pytest_xdist-3.6.1-py3-none-any.whl", hash = "sha256:9ed4adfb68a016610848639bb7e02c9352d5d9f03d04809919e2dafc3be4cca7", size = 46108, upload-time = "2024-04-28T19:29:52.813Z" },
+]
+
+[[package]]
+name = "pytest-xdist"
+version = "3.8.0"
+source = { registry = "https://pypi.org/simple" }
+resolution-markers = [
+    "python_full_version >= '3.11'",
+    "python_full_version == '3.10.*'",
+    "python_full_version == '3.9.*'",
+]
+dependencies = [
+    { name = "execnet", marker = "python_full_version >= '3.9'" },
+    { name = "pytest", version = "8.4.2", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.9'" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/78/b4/439b179d1ff526791eb921115fca8e44e596a13efeda518b9d845a619450/pytest_xdist-3.8.0.tar.gz", hash = "sha256:7e578125ec9bc6050861aa93f2d59f1d8d085595d6551c2c90b6f4fad8d3a9f1", size = 88069, upload-time = "2025-07-01T13:30:59.346Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/ca/31/d4e37e9e550c2b92a9cbc2e4d0b7420a27224968580b5a447f420847c975/pytest_xdist-3.8.0-py3-none-any.whl", hash = "sha256:202ca578cfeb7370784a8c33d6d05bc6e13b4f25b5053c30a152269fd10f0b88", size = 46396, upload-time = "2025-07-01T13:30:56.632Z" },
+]
+
 [[package]]
 name = "python-dateutil"
 version = "2.9.0.post0"
@@ -3382,6 +3425,8 @@ dev = [
     { name = "pytest-mock", version = "3.14.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.9'" },
     { name = "pytest-mock", version = "3.15.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.9'" },
     { name = "pytest-taskgraph" },
+    { name = "pytest-xdist", version = "3.6.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.9'" },
+    { name = "pytest-xdist", version = "3.8.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.9'" },
     { name = "responses" },
     { name = "sphinx", version = "6.2.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.9'" },
     { name = "sphinx", version = "7.4.7", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version == '3.9.*'" },
@@ -3427,6 +3472,7 @@ dev = [
     { name = "pytest" },
     { name = "pytest-mock" },
     { name = "pytest-taskgraph", editable = "packages/pytest-taskgraph" },
+    { name = "pytest-xdist", specifier = ">=3.6.1" },
     { name = "responses" },
     { name = "sphinx" },
     { name = "sphinx-argparse" },