diff --git a/news/10004.trivial.rst b/news/10004.trivial.rst
new file mode 100644
index 000000000..128cf866d
--- /dev/null
+++ b/news/10004.trivial.rst
@@ -0,0 +1 @@
+Annotate ``typing.List`` into ``tools.tox_pip.pip()``
diff --git a/tools/tox_pip.py b/tools/tox_pip.py
index fe7621342..6a0e2dae9 100644
--- a/tools/tox_pip.py
+++ b/tools/tox_pip.py
@@ -9,8 +9,7 @@ VIRTUAL_ENV = os.environ['VIRTUAL_ENV']
 TOX_PIP_DIR = os.path.join(VIRTUAL_ENV, 'pip')
 
 
-def pip(args):
-    # type: (List[str]) -> None
+def pip(args: List[str]) -> None:
     # First things first, get a recent (stable) version of pip.
     if not os.path.exists(TOX_PIP_DIR):
         subprocess.check_call([sys.executable, '-m', 'pip',