diff --git a/docs/changelog/3389.bugfix.rst b/docs/changelog/3389.bugfix.rst
new file mode 100644
index 000000000..c0f6db23d
--- /dev/null
+++ b/docs/changelog/3389.bugfix.rst
@@ -0,0 +1,2 @@
+Include ``tox.toml`` in sdist archives to fix test failures resulting from its lack.
+- by :user:`mgorny`
diff --git a/pyproject.toml b/pyproject.toml
index 4f9836d6e..50142c5b2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -107,7 +107,7 @@ build.hooks.vcs.version-file = "src/tox/version.py"
 build.targets.sdist.include = [
   "/src",
   "/tests",
-  "/tox.ini",
+  "/tox.toml",
 ]
 version.source = "vcs"