diff --git a/src/cdk/a11y/_a11y.scss b/src/cdk/a11y/_a11y.scss
index b9bbc4105da..2e67669f09a 100644
--- a/src/cdk/a11y/_a11y.scss
+++ b/src/cdk/a11y/_a11y.scss
@@ -8,6 +8,13 @@
     padding: 0;
     position: absolute;
     width: 1px;
+
+    // Avoid browsers rendering the focus ring in some cases.
+    outline: 0;
+
+    // Avoid some cases where the browser will still render the native controls (see #9049).
+    -webkit-appearance: none;
+    -moz-appearance: none;
   }
 }