Bug 1865267 - Intermittent /css/css-contain/content-visibility/content-visibility-vs-scrollIntoView-003.html, r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D197347

testing/web-platform/meta/css/css-contain/content-visibility/content-visibility-vs-scrollIntoView-003.html.ini

@@ -1,6 +0,0 @@
-[content-visibility-vs-scrollIntoView-003.html]
-  expected:
-    if os == "linux": [OK, ERROR]
-  [ContentVisibilityAutoStateChange fires twice when `scrollIntoView` a descendant of `content-visibility:auto` which is hidden after scrolling]
-    expected:
-      if os == "linux": [PASS, FAIL]

testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-vs-scrollIntoView-003.html

@@ -56,12 +56,13 @@ function tick() {
   });
 }
 
-promise_test(async () => {
-    await tick();
+function waitForEvent() {
+    return new Promise(resolve => e3.addEventListener('contentvisibilityautostatechange', resolve));
+}
 
-    function waitForEvent() {
-        return new Promise(resolve => e3.addEventListener('contentvisibilityautostatechange', resolve));
-    }
+promise_test(async (t) => {
+    // Make sure the first event has fired.
+    await waitForEvent();
 
     var eventCounter = 0;
     function eventHandler(e) {