diff --git a/xarray/tests/arrays.py b/xarray/tests/arrays.py
index cc4c480c437..31f380d2c66 100644
--- a/xarray/tests/arrays.py
+++ b/xarray/tests/arrays.py
@@ -1,3 +1,7 @@
+"""
+This module contains various lazy array classes which can be wrapped and manipulated by xarray objects but will raise on data access.
+"""
+
 from collections.abc import Callable, Iterable
 from typing import Any
 
@@ -6,10 +10,6 @@
 from xarray.core import utils
 from xarray.core.indexing import ExplicitlyIndexed
 
-"""
-This module contains various lazy array classes which can be wrapped and manipulated by xarray objects but will raise on data access.
-"""
-
 
 class UnexpectedDataAccess(Exception):
     pass