diff --git a/Tests/images/palette_negative.png b/Tests/images/palette_negative.png
index 7fcfd29a0..2bce8d749 100644
Binary files a/Tests/images/palette_negative.png and b/Tests/images/palette_negative.png differ
diff --git a/Tests/images/palette_sepia.png b/Tests/images/palette_sepia.png
index 9e7d6b034..77cec03de 100644
Binary files a/Tests/images/palette_sepia.png and b/Tests/images/palette_sepia.png differ
diff --git a/Tests/images/palette_wedge.png b/Tests/images/palette_wedge.png
index 4b3d9ff3a..613c34daa 100644
Binary files a/Tests/images/palette_wedge.png and b/Tests/images/palette_wedge.png differ
diff --git a/Tests/test_image_entropy.py b/Tests/test_image_entropy.py
index c1dbb879b..a0230dff5 100644
--- a/Tests/test_image_entropy.py
+++ b/Tests/test_image_entropy.py
@@ -11,7 +11,7 @@ def test_entropy() -> None:
     assert round(abs(entropy("L") - 7.063008716585465), 7) == 0
     assert round(abs(entropy("I") - 7.063008716585465), 7) == 0
     assert round(abs(entropy("F") - 7.063008716585465), 7) == 0
-    assert round(abs(entropy("P") - 5.082506854662517), 7) == 0
+    assert round(abs(entropy("P") - 5.085630558679487), 7) == 0
     assert round(abs(entropy("RGB") - 8.821286587714319), 7) == 0
     assert round(abs(entropy("RGBA") - 7.42724306524488), 7) == 0
     assert round(abs(entropy("CMYK") - 7.4272430652448795), 7) == 0
diff --git a/Tests/test_image_histogram.py b/Tests/test_image_histogram.py
index 436eb78a2..864af4d84 100644
--- a/Tests/test_image_histogram.py
+++ b/Tests/test_image_histogram.py
@@ -14,7 +14,7 @@ def test_histogram() -> None:
     assert histogram("La") == (512, 0, 16384)
     assert histogram("I") == (256, 0, 662)
     assert histogram("F") == (256, 0, 662)
-    assert histogram("P") == (256, 0, 1551)
+    assert histogram("P") == (256, 0, 1557)
     assert histogram("PA") == (512, 0, 16384)
     assert histogram("RGB") == (768, 4, 675)
     assert histogram("RGBA") == (1024, 0, 16384)