diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 7b404b5..8836376 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -13,7 +13,7 @@ permissions:
 on:
   push:
     branches:
-      - main
+      - master
     tags-ignore:
       - '**'
   pull_request:
diff --git a/__test__/chickenfeet-4bpp-with-tEXt.png b/__test__/chickenfeet-4bpp-with-tEXt.png
new file mode 100644
index 0000000..fd5b69e
Binary files /dev/null and b/__test__/chickenfeet-4bpp-with-tEXt.png differ