diff --git a/test/test-suite/test_foreign.py b/test/test-suite/test_foreign.py
index 6591d9a8..feea0a61 100644
--- a/test/test-suite/test_foreign.py
+++ b/test/test-suite/test_foreign.py
@@ -453,10 +453,10 @@ class TestForeign:
         assert self.colour.height == x.height
         assert self.colour.bands == x.bands
         max_diff = (self.colour - x).abs().max()
-        assert max_diff < 20
+        assert max_diff < 40
 
         self.save_load_buffer("magicksave_buffer", "magickload_buffer",
-                              self.colour, 20, format="JPG")
+                              self.colour, 40, format="JPG")
 
     @skip_if_no("webpload")
     def test_webp(self):