diff --git a/Tests/test_imagepalette.py b/Tests/test_imagepalette.py
index 9c4f8acfb58..ecfbda1d89b 100644
--- a/Tests/test_imagepalette.py
+++ b/Tests/test_imagepalette.py
@@ -49,23 +49,27 @@ def test_getcolor():
         palette.getcolor("unknown")
 
 
-def test_getcolor_not_special():
-    im = Image.new("P", (1, 1))
-    for index, palette in {
+@pytest.mark.parametrize(
+    "index, palette",
+    [
         # Test when the palette is not full
-        0: ImagePalette.ImagePalette(),
+        (0, ImagePalette.ImagePalette()),
         # Test when the palette is full
-        255: ImagePalette.ImagePalette("RGB", list(range(256)) * 3),
-    }.items():
-        # Do not use transparency index as a new color
-        im.info["transparency"] = index
-        index1 = palette.getcolor((0, 0, 0), im)
-        assert index1 != index
-
-        # Do not use background index as a new color
-        im.info["background"] = index1
-        index2 = palette.getcolor((0, 0, 1), im)
-        assert index2 not in (index, index1)
+        (255, ImagePalette.ImagePalette("RGB", list(range(256)) * 3)),
+    ],
+)
+def test_getcolor_not_special(index, palette):
+    im = Image.new("P", (1, 1))
+
+    # Do not use transparency index as a new color
+    im.info["transparency"] = index
+    index1 = palette.getcolor((0, 0, 0), im)
+    assert index1 != index
+
+    # Do not use background index as a new color
+    im.info["background"] = index1
+    index2 = palette.getcolor((0, 0, 1), im)
+    assert index2 not in (index, index1)
 
 
 def test_file(tmp_path):