diff --git a/accessible/base/DocManager.cpp b/accessible/base/DocManager.cpp
index 477ef45ca008..874e030a4f67 100644
--- a/accessible/base/DocManager.cpp
+++ b/accessible/base/DocManager.cpp
@@ -554,6 +554,7 @@ void DocManager::ClearDocCache() {
 }
 
 void DocManager::RemoteDocAdded(DocAccessibleParent* aDoc) {
+  MOZ_ASSERT(aDoc->IsTopLevel());
   if (!sRemoteDocuments) {
     sRemoteDocuments = new nsTArray<DocAccessibleParent*>;
     ClearOnShutdown(&sRemoteDocuments);
@@ -563,6 +564,12 @@ void DocManager::RemoteDocAdded(DocAccessibleParent* aDoc) {
              "How did we already have the doc!");
   sRemoteDocuments->AppendElement(aDoc);
   ProxyCreated(aDoc);
+  // Fire a reorder event on the OuterDocAccessible.
+  if (LocalAccessible* outerDoc = aDoc->OuterDocOfRemoteBrowser()) {
+    MOZ_ASSERT(outerDoc->Document());
+    RefPtr<AccReorderEvent> reorder = new AccReorderEvent(outerDoc);
+    outerDoc->Document()->FireDelayedEvent(reorder);
+  }
 }
 
 DocAccessible* mozilla::a11y::GetExistingDocAccessible(
diff --git a/accessible/tests/browser/events/browser.toml b/accessible/tests/browser/events/browser.toml
index e9806dc477a4..098af8ebfe8f 100644
--- a/accessible/tests/browser/events/browser.toml
+++ b/accessible/tests/browser/events/browser.toml
@@ -19,7 +19,6 @@ support-files = [
 ["browser_test_caret_move_granularity.js"]
 
 ["browser_test_docload.js"]
-skip-if = ["true"]
 
 ["browser_test_focus_browserui.js"]
 
diff --git a/accessible/tests/browser/events/browser_test_docload.js b/accessible/tests/browser/events/browser_test_docload.js
index 12076b3002d7..314b5177630d 100644
--- a/accessible/tests/browser/events/browser_test_docload.js
+++ b/accessible/tests/browser/events/browser_test_docload.js
@@ -31,17 +31,13 @@ function urlChecker(url) {
 }
 
 async function runTests(browser) {
-  let onLoadEvents = waitForEvents({
-    expected: [
-      [EVENT_REORDER, getAccessible(browser)],
-      [EVENT_DOCUMENT_LOAD_COMPLETE, "body2"],
-      [EVENT_STATE_CHANGE, busyChecker(false)],
-    ],
-    unexpected: [
-      [EVENT_DOCUMENT_LOAD_COMPLETE, inIframeChecker("iframe1")],
-      [EVENT_STATE_CHANGE, inIframeChecker("iframe1")],
-    ],
-  });
+  let onLoadEvents = waitForEvents([
+    [EVENT_REORDER, getAccessible(browser)],
+    [EVENT_DOCUMENT_LOAD_COMPLETE, "body2"],
+    [EVENT_STATE_CHANGE, busyChecker(false)],
+    [EVENT_DOCUMENT_LOAD_COMPLETE, inIframeChecker("iframe1")],
+    [EVENT_STATE_CHANGE, inIframeChecker("iframe1")],
+  ]);
 
   BrowserTestUtils.startLoadingURIString(
     browser,
@@ -123,6 +119,6 @@ async function runTests(browser) {
 }
 
 /**
- * Test caching of accessible object states
+ * Test events when a document loads.
  */
 addAccessibleTask("", runTests);