diff --git a/Tests/test_imageops.py b/Tests/test_imageops.py
index 367ba7e3e..1051d9843 100644
--- a/Tests/test_imageops.py
+++ b/Tests/test_imageops.py
@@ -130,8 +130,9 @@ def test_pad():
             )
 
 
-def test_palette():
-    im = hopper("P")
+@pytest.mark.parametrize("mode", ("P", "PA"))
+def test_palette(mode):
+    im = hopper(mode)
 
     # Expand
     expanded_im = ImageOps.expand(im)
diff --git a/src/PIL/ImageOps.py b/src/PIL/ImageOps.py
index 99f10d739..57a032c94 100644
--- a/src/PIL/ImageOps.py
+++ b/src/PIL/ImageOps.py
@@ -398,7 +398,7 @@ def expand(image, border=0, fill=0):
     width = left + image.size[0] + right
     height = top + image.size[1] + bottom
     color = _color(fill, image.mode)
-    if image.mode == "P" and image.palette:
+    if image.palette:
         palette = ImagePalette.ImagePalette(palette=image.getpalette())
         if isinstance(color, tuple):
             color = palette.getcolor(color)