diff --git a/test/py/u_boot_console_sandbox.py b/test/py/u_boot_console_sandbox.py
index 836f5a9e2b8..7e1eb0e0b45 100644
--- a/test/py/u_boot_console_sandbox.py
+++ b/test/py/u_boot_console_sandbox.py
@@ -2,7 +2,9 @@
 # Copyright (c) 2015 Stephen Warren
 # Copyright (c) 2015-2016, NVIDIA CORPORATION. All rights reserved.
 
-# Logic to interact with the sandbox port of U-Boot, running as a sub-process.
+"""
+Logic to interact with the sandbox port of U-Boot, running as a sub-process.
+"""
 
 import time
 from u_boot_spawn import Spawn