diff --git a/.gitignore b/.gitignore
index afc99012..6dd2dfeb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 target
 Cargo.lock
 *.bk
+.DS_Store
diff --git a/tests/files/test_palette.png b/tests/files/test_palette.png
new file mode 100644
index 00000000..3f4de11f
Binary files /dev/null and b/tests/files/test_palette.png differ
diff --git a/tests/files/test_rgb.png b/tests/files/test_rgb.png
new file mode 100644
index 00000000..9a7488a7
Binary files /dev/null and b/tests/files/test_rgb.png differ
diff --git a/tests/files/test_rgba.png b/tests/files/test_rgba.png
new file mode 100644
index 00000000..5ecbc7fc
Binary files /dev/null and b/tests/files/test_rgba.png differ