diff --git a/Tests/images/FudanPed00003_mask.png b/Tests/images/FudanPed00003_mask.png
new file mode 100644
index 000000000..b58d856e9
Binary files /dev/null and b/Tests/images/FudanPed00003_mask.png differ
diff --git a/Tests/test_file_png.py b/Tests/test_file_png.py
index c4db97905..5bfbbbab8 100644
--- a/Tests/test_file_png.py
+++ b/Tests/test_file_png.py
@@ -99,6 +99,18 @@ class TestFilePng:
                 if mode == "I;16":
                     reloaded = reloaded.convert(mode)
                 assert_image_equal(reloaded, im)
+    
+    def test_putpalette(self):
+        valid_file = "Tests/images/FudanPed00003_mask.png"
+        with pytest.raises(ValueError) as err:
+            mask = Image.open(valid_file)
+            mask.putpalette([
+                0, 0, 0, # black background
+                255, 0, 0, # index 1 is red
+                255, 255, 0, # index 2 is yellow
+                255, 153, 0, # index 3 is orange
+            ])
+
 
     def test_invalid_file(self):
         invalid_file = "Tests/images/flower.jpg"