diff --git a/docs/changelog/3415.misc.rst b/docs/changelog/3415.misc.rst
new file mode 100644
index 000000000..e640d66eb
--- /dev/null
+++ b/docs/changelog/3415.misc.rst
@@ -0,0 +1 @@
+Provide ``test`` extra to support plugin authors using ``tox.pytest``.
diff --git a/pyproject.toml b/pyproject.toml
index 3849bc8d9..74219b145 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -62,6 +62,11 @@ dependencies = [
   "typing-extensions>=4.12.2; python_version<'3.11'",
   "virtualenv>=20.26.6",
 ]
+optional-dependencies.test = [
+  "devpi-process>=1.0.2",
+  "pytest>=8.3.3",
+  "pytest-mock>=3.14",
+]
 urls.Documentation = "https://tox.wiki"
 urls.Homepage = "http://tox.readthedocs.org"
 urls."Release Notes" = "https://tox.wiki/en/latest/changelog.html"