diff --git a/Tests/test_imagemath_lambda_eval.py b/Tests/test_imagemath_lambda_eval.py
index 3915e64aa..5769c903e 100644
--- a/Tests/test_imagemath_lambda_eval.py
+++ b/Tests/test_imagemath_lambda_eval.py
@@ -1,7 +1,5 @@
 from __future__ import annotations
 
-import pytest
-
 from PIL import Image, ImageMath
 
 
diff --git a/src/PIL/ImageMath.py b/src/PIL/ImageMath.py
index 2ffebbe71..5d83929dc 100644
--- a/src/PIL/ImageMath.py
+++ b/src/PIL/ImageMath.py
@@ -236,9 +236,11 @@ ops = {
 }
 
 
-def lambda_eval(expression: Callable[[dict[str, Any]], Any],
+def lambda_eval(
+    expression: Callable[[dict[str, Any]], Any],
     _dict: dict[str, Any] = {},
-    **kw: Any,) -> Any:
+    **kw: Any,
+) -> Any:
     """
     Returns the result of an image function.