diff --git a/Tests/images/ati1.dds b/Tests/images/ati1.dds
index dc9445d89ab..747e4b1b98a 100644
Binary files a/Tests/images/ati1.dds and b/Tests/images/ati1.dds differ
diff --git a/Tests/images/ati1.png b/Tests/images/ati1.png
index da475dfd7b0..790d7d7dbb2 100644
Binary files a/Tests/images/ati1.png and b/Tests/images/ati1.png differ
diff --git a/Tests/images/ati2.dds b/Tests/images/ati2.dds
index 7199dcad762..3ac5f7956ea 100644
Binary files a/Tests/images/ati2.dds and b/Tests/images/ati2.dds differ
diff --git a/Tests/images/ati2.png b/Tests/images/ati2.png
deleted file mode 100644
index ac166965944..00000000000
Binary files a/Tests/images/ati2.png and /dev/null differ
diff --git a/Tests/test_file_dds.py b/Tests/test_file_dds.py
index d215e901d1c..35100119926 100644
--- a/Tests/test_file_dds.py
+++ b/Tests/test_file_dds.py
@@ -72,7 +72,7 @@ def test_sanity_ati1():
 
         assert im.format == "DDS"
         assert im.mode == "L"
-        assert im.size == (128, 128)
+        assert im.size == (64, 64)
 
         assert_image_equal_tofile(im, TEST_FILE_ATI1.replace(".dds", ".png"))
 
@@ -85,9 +85,9 @@ def test_sanity_ati2():
 
         assert im.format == "DDS"
         assert im.mode == "RGB"
-        assert im.size == (128, 128)
+        assert im.size == (256, 256)
 
-        assert_image_equal_tofile(im, TEST_FILE_ATI2.replace(".dds", ".png"))
+        assert_image_equal_tofile(im, TEST_FILE_DX10_BC5_UNORM.replace(".dds", ".png"))
 
 
 @pytest.mark.parametrize(