diff --git a/xarray/core/duck_array_ops.py b/xarray/core/duck_array_ops.py
index 48dc3b7627a..d8c18085d1f 100644
--- a/xarray/core/duck_array_ops.py
+++ b/xarray/core/duck_array_ops.py
@@ -17,11 +17,11 @@
 
 import numpy as np
 import pandas as pd
-from numpy import (  # noqa: F401
+from numpy import (
     isclose,
     isnat,
     take,
-    unravel_index,
+    unravel_index,  # noqa: F401
 )
 from pandas.api.types import is_extension_array_dtype