1 files changed, 3 insertions, 1 deletions
diff --git a/testing/web-platform/tests/css/css-scoping/font-face-006.html b/testing/web-platform/tests/css/css-scoping/font-face-006.html
index 5eabe6ab76..8c6e341713 100644
--- a/testing/web-platform/tests/css/css-scoping/font-face-006.html
+++ b/testing/web-platform/tests/css/css-scoping/font-face-006.html
@@ -16,7 +16,7 @@
 </style>
 <div id="host"></div>
 <script>
-test(function() {
+promise_test(async function() {
   host.attachShadow({ mode: "open" }).innerHTML = `
     <style>
       :host::before, :host::after {
@@ -27,6 +27,8 @@ test(function() {
     <slot></slot>
   `;
 
+  await document.fonts.ready;
+
   //shrinkwrapped size for a default font will be a bit more than 80-90
   //if the font is applied, it will be a bit more than 160
   assert_greater_than(document.getElementById('host').offsetWidth, 160);