diff --git a/test/fixtures/expected/embed-16bit.png b/test/fixtures/expected/embed-16bit.png
index 9b49e8cb..f5981791 100644
Binary files a/test/fixtures/expected/embed-16bit.png and b/test/fixtures/expected/embed-16bit.png differ
diff --git a/test/unit/threshold.js b/test/unit/threshold.js
index 7609e582..dd0cecfc 100644
--- a/test/unit/threshold.js
+++ b/test/unit/threshold.js
@@ -96,7 +96,7 @@ describe('Threshold', function() {
         .threshold()
         .toBuffer(function(err, data, info) {
           assert.strictEqual('webp', info.format);
-          fixtures.assertSimilar(fixtures.expected('threshold-128-transparency.webp'), data, done);
+          fixtures.assertSimilar(fixtures.expected('threshold-128-transparency.webp'), data, { threshold: 14 }, done);
         });
     });
   }