diff --git a/Tests/test_image.py b/Tests/test_image.py
index 54abb66438e..d876d09b948 100644
--- a/Tests/test_image.py
+++ b/Tests/test_image.py
@@ -696,7 +696,15 @@ def _make_new(
 
     @pytest.mark.parametrize("mode", image_modes)
     def test_pixels_from_new_image_by_color(self, mode: ImageModeInfo) -> None:
-        color = 123 if mode.num_bands == 1 else tuple(range(mode.num_bands))
+        if mode.name in ("BGR;15", "BGR;16"):
+            # These modes have fewer than 8 bits per band,
+            # so not all values can be round-tripped.
+            color = (16, 32, 49)
+        elif mode.num_bands == 1:
+            color = 123
+        else:
+            color = tuple(range(mode.num_bands))
+
         im = Image.new(mode.name, (2, 2), color=color)
 
         assert im.getpixel((0, 0)) == color