diff --git a/noxfile.py b/noxfile.py
index 16cf97b01..4ff9eab7b 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -74,7 +74,7 @@ def lint(session):
     session.run("flake8", "google", "tests")
 
 
-@nox.session(python="3.14")
+@nox.session(python=DEFAULT_PYTHON_VERSION, name="format")
 def blacken(session):
     """Run black.