diff --git a/noxfile.py b/noxfile.py
index 70e6593..a786e7c 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -1,6 +1,14 @@
 import nox
 
+
 @nox.session()
 def tests(session):
     session.install(".[tests]")
-    session.run("pytest", '--driver=firefox', *session.posargs)
+    session.run("pytest", "--driver=firefox", *session.posargs)
+
+
+@nox.session()
+def black(session):
+    session.install(".[tests]")
+    session.run("black", "zundler", "--check", *session.posargs)
+    session.run("black", "tests", "--check", *session.posargs)
diff --git a/pyproject.toml b/pyproject.toml
index 22fb14f..69a4bfb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -61,6 +61,7 @@ tests = [
     'pytest>=8',
     'selenium',
     'pytest-selenium',
+    'black',
 ]
 
 [tool.pytest.ini_options]