diff --git a/docs/nix/render_options/__init__.py b/docs/nix/render_options/__init__.py
index acf5fe568..ad3351556 100644
--- a/docs/nix/render_options/__init__.py
+++ b/docs/nix/render_options/__init__.py
@@ -1,3 +1,5 @@
+"""Module for rendering NixOS options documentation from JSON format."""
+
 # Options are available in the following format:
 # https://github.com/nixos/nixpkgs/blob/master/nixos/lib/make-options-doc/default.nix
 #
diff --git a/lib/test/container-test-driver/test_driver/__init__.py b/lib/test/container-test-driver/test_driver/__init__.py
index a2e4c5e4f..b17af3a8c 100644
--- a/lib/test/container-test-driver/test_driver/__init__.py
+++ b/lib/test/container-test-driver/test_driver/__init__.py
@@ -1,3 +1,5 @@
+"""Test driver for container-based NixOS testing."""
+
 import argparse
 import ctypes
 import os