diff --git a/tools/material-ci/angular_material_test_blocklist.js b/tools/material-ci/angular_material_test_blocklist.js
index aff9dafcac..302f86d038 100644
--- a/tools/material-ci/angular_material_test_blocklist.js
+++ b/tools/material-ci/angular_material_test_blocklist.js
@@ -23,7 +23,7 @@ window.testBlocklist = {
   },
   "MatBadge should clear any pre-existing badges": {
     "error": "Error: Expected 2 to be 1.",
-    "notes": "Unknown"
+    "notes": "Breaking change: Static directive inputs evaluated in creation mode (MatBadge._clearExistingBadges is executed before child nodes of PreExistingBadge are aded to the DOM)"
   },
   "MatSidenav should be fixed position when in fixed mode": {
     "error": "Error: Expected ng-tns-c380-0 ng-trigger ng-trigger-transform mat-drawer mat-sidenav mat-drawer-over ng-star-inserted to contain 'mat-sidenav-fixed'.",