diff --git a/Tests/test_file_apng.py b/Tests/test_file_apng.py
index b48995ab6..e34e23fe3 100644
--- a/Tests/test_file_apng.py
+++ b/Tests/test_file_apng.py
@@ -1,6 +1,5 @@
-from PIL import Image, ImageSequence, PngImagePlugin
-
 import pytest
+from PIL import Image, ImageSequence, PngImagePlugin
 
 from .helper import PillowTestCase
 
diff --git a/Tests/test_file_png.py b/Tests/test_file_png.py
index 47ac40f8f..980b581fe 100644
--- a/Tests/test_file_png.py
+++ b/Tests/test_file_png.py
@@ -10,7 +10,6 @@ from .helper import (
     PillowTestCase,
     assert_image,
     assert_image_equal,
-    assert_image_similar,
     hopper,
     is_big_endian,
     is_win32,
@@ -18,7 +17,6 @@ from .helper import (
     skip_unless_feature,
 )
 
-
 # sample png stream
 
 TEST_PNG_FILE = "Tests/images/hopper.png"