diff --git a/packages/css-syntax-patches-for-csstree/dist/index.json b/packages/css-syntax-patches-for-csstree/dist/index.json
index 0430ddbaf..88401fb92 100644
--- a/packages/css-syntax-patches-for-csstree/dist/index.json
+++ b/packages/css-syntax-patches-for-csstree/dist/index.json
@@ -14,6 +14,7 @@
 			"clip": "<shape> | auto",
 			"color-adjust": "<'print-color-adjust'>",
 			"justify-items": "| anchor-center",
+			"mix-blend-mode": "<blend-mode> | plus-darker | plus-lighter",
 			"position-anchor": "auto | <anchor-element>"
 		},
 		"types": {
diff --git a/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-properties.json b/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-properties.json
index 64ddf03de..26f78e42e 100644
--- a/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-properties.json
+++ b/packages/css-syntax-patches-for-csstree/patches/webref-over-csstree-properties.json
@@ -2662,8 +2662,8 @@
 		"type": "modified",
 		"syntax-before": "<blend-mode> | plus-lighter",
 		"syntax-after": "<blend-mode> | plus-darker | plus-lighter",
-		"comment": "<blend-mode> | plus-lighter",
-		"merged": false,
+		"comment": "",
+		"merged": "<blend-mode> | plus-darker | plus-lighter",
 		"tests": {
 			"passing": [
 				{
@@ -2671,11 +2671,14 @@
 				},
 				{
 					"value": "plus-lighter"
+				},
+				{
+					"value": "plus-darker"
 				}
 			],
 			"failing": [
 				{
-					"value": "plus-darker"
+					"value": "plus-foo"
 				}
 			]
 		}