--- a/browser/base/content/test/urlbar/browser_page_action_menu.js
+++ b/browser/base/content/test/urlbar/browser_page_action_menu.js
@@ -50,19 +50,25 @@ add_task(async function bookmark() {
     await new Promise(resolve => {
       if (StarUI.panel.state == "open") {
         resolve();
         return;
       }
       StarUI.panel.addEventListener("popupshown", resolve, { once: true });
     });
 
+    let onItemRemovedPromise = PlacesTestUtils.waitForNotification("onItemRemoved",
+      (id, parentId, index, type, itemUrl) => url == itemUrl.spec);
+
     // Click the remove-bookmark button in the panel.
     StarUI._element("editBookmarkPanelRemoveButton").click();
 
+    // Wait for the bookmark to be removed before continuing.
+    await onItemRemovedPromise;
+
     // Open the panel again.
     await promisePageActionPanelOpen();
 
     // The bookmark button should read "Bookmark This Page" and not be starred.
     Assert.equal(bookmarkButton.label, "Bookmark This Page");
     Assert.ok(!bookmarkButton.hasAttribute("starred"));
 
     // Done.