diff --git a/Tests/test_file_gimppalette.py b/Tests/test_file_gimppalette.py
index 23bb8aaabfc..ab45664af6a 100644
--- a/Tests/test_file_gimppalette.py
+++ b/Tests/test_file_gimppalette.py
@@ -23,6 +23,7 @@ def test_sanity():
 def test_large_file_is_truncated():
     import warnings
     from unittest.mock import patch
+
     try:
         original_value = GimpPaletteFile._max_file_size
         GimpPaletteFile._max_file_size = 100
@@ -35,6 +36,7 @@ def test_large_file_is_truncated():
     finally:
         GimpPaletteFile._max_file_size = original_value
 
+
 def test_get_palette():
     # Arrange
     with open("Tests/images/custom_gimp_palette.gpl", "rb") as fp:
diff --git a/src/PIL/GimpPaletteFile.py b/src/PIL/GimpPaletteFile.py
index ff5d6e10f19..2d7104b202a 100644
--- a/src/PIL/GimpPaletteFile.py
+++ b/src/PIL/GimpPaletteFile.py
@@ -28,7 +28,7 @@ class GimpPaletteFile:
     #: override if reading larger palettes is needed
     max_colors = 256
     _max_line_size = 100
-    _max_file_size = 2 ** 20
+    _max_file_size = 2**20
 
     def __init__(self, fp):
 
@@ -47,7 +47,8 @@ def __init__(self, fp):
             read += len(s)
             if read >= self._max_file_size:
                 warnings.warn(
-                    f"Palette file truncated at {self._max_file_size - len(s)} bytes")
+                    f"Palette file truncated at {self._max_file_size - len(s)} bytes"
+                )
                 break
 
             # skip fields and comment lines