diff --git a/Tests/test_file_vtf.py b/Tests/test_file_vtf.py
index b0e7321fe48..d84981885b5 100644
--- a/Tests/test_file_vtf.py
+++ b/Tests/test_file_vtf.py
@@ -63,7 +63,7 @@ def test_get_mipmap_count(size: Tuple[int, int], expected_count: int):
     ],
 )
 def test_get_texture_size(
-        pixel_format: VtfPF, size: Tuple[int, int], expected_size: int
+    pixel_format: VtfPF, size: Tuple[int, int], expected_size: int
 ):
     assert _get_texture_size(pixel_format, *size) == expected_size
 
@@ -82,9 +82,7 @@ def test_get_texture_size(
         ("Tests/images/vtf_rgba8888.png", "Tests/images/vtf_rgba8888.vtf", "RGBA", 0),
     ],
 )
-def test_vtf_read(
-        etalon_path: str, file_path: str, expected_mode: str, epsilon: float
-):
+def test_vtf_read(etalon_path: str, file_path: str, expected_mode: str, epsilon: float):
     e = Image.open(etalon_path)
     f = Image.open(file_path)
     assert f.mode == expected_mode
@@ -109,8 +107,9 @@ def test_vtf_read(
         (VtfPF.RGBA8888, "Tests/images/vtf_rgba8888.png", "RGBA", 0),
     ],
 )
-def test_vtf_save(pixel_format: VtfPF, file_path: str,
-                  expected_mode: str, epsilon: float, tmp_path):
+def test_vtf_save(
+    pixel_format: VtfPF, file_path: str, expected_mode: str, epsilon: float, tmp_path
+):
     f: Image.Image = Image.open(file_path)
     out = (tmp_path / "tmp.vtf").as_posix()
     f.save(out, pixel_format=pixel_format)
diff --git a/src/PIL/VtfImagePlugin.py b/src/PIL/VtfImagePlugin.py
index 79f82d92e87..bea11ae16ee 100644
--- a/src/PIL/VtfImagePlugin.py
+++ b/src/PIL/VtfImagePlugin.py
@@ -137,7 +137,10 @@ def _get_texture_size(pixel_format: VtfPF, width, height):
         return width * height // 2
     elif pixel_format in (VtfPF.DXT3, VtfPF.DXT5):
         return width * height
-    elif pixel_format in (VtfPF.A8, VtfPF.I8,):
+    elif pixel_format in (
+        VtfPF.A8,
+        VtfPF.I8,
+    ):
         return width * height
     elif pixel_format in (VtfPF.UV88, VtfPF.IA88):
         return width * height * 2
@@ -205,7 +208,7 @@ def _write_image(fp: BufferedIOBase, im: Image.Image, pixel_format: VtfPF):
 
 def _closest_power(x):
     possible_results = round(log(x, 2)), ceil(log(x, 2))
-    return 2 ** min(possible_results, key=lambda z: abs(x - 2 ** z))
+    return 2 ** min(possible_results, key=lambda z: abs(x - 2**z))
 
 
 class VtfImageFile(ImageFile.ImageFile):
@@ -246,8 +249,15 @@ def _open(self):
         # flags = CompiledVtfFlags(header.flags)
         pixel_format = VtfPF(header.pixel_format)
         low_format = VtfPF(header.low_pixel_format)
-        if pixel_format in (VtfPF.DXT1_ONEBITALPHA, VtfPF.DXT1, VtfPF.DXT3, VtfPF.DXT5,
-                            VtfPF.RGBA8888, VtfPF.BGRA8888,VtfPF.A8):
+        if pixel_format in (
+            VtfPF.DXT1_ONEBITALPHA,
+            VtfPF.DXT1,
+            VtfPF.DXT3,
+            VtfPF.DXT5,
+            VtfPF.RGBA8888,
+            VtfPF.BGRA8888,
+            VtfPF.A8,
+        ):
             self.mode = "RGBA"
         elif pixel_format in (VtfPF.RGB888, VtfPF.BGR888, VtfPF.UV88):
             self.mode = "RGB"
@@ -309,9 +319,14 @@ def _save(im, fp, filename):
 
     if pixel_format == VtfPF.DXT1_ONEBITALPHA:
         flags |= CompiledVtfFlags.ONEBITALPHA
-    elif pixel_format in (VtfPF.DXT3, VtfPF.DXT5,
-                          VtfPF.RGBA8888, VtfPF.BGRA8888,
-                          VtfPF.A8, VtfPF.IA88):
+    elif pixel_format in (
+        VtfPF.DXT3,
+        VtfPF.DXT5,
+        VtfPF.RGBA8888,
+        VtfPF.BGRA8888,
+        VtfPF.A8,
+        VtfPF.IA88,
+    ):
         flags |= CompiledVtfFlags.EIGHTBITALPHA
     else:
         pass