1 files changed, 12 insertions, 0 deletions
diff --git a/browser/components/firefoxview/tests/browser/browser_recentlyclosed_firefoxview.js b/browser/components/firefoxview/tests/browser/browser_recentlyclosed_firefoxview.js
index fcfcf20562..85879667bb 100644
--- a/browser/components/firefoxview/tests/browser/browser_recentlyclosed_firefoxview.js
+++ b/browser/components/firefoxview/tests/browser/browser_recentlyclosed_firefoxview.js
@@ -372,6 +372,12 @@ add_task(async function test_dismiss_tab() {
 
     info("calling dismiss_tab on the top, most-recently closed tab");
     let closedTabItem = listItems[0];
+    // the most recently closed tab was in window 3 which got closed
+    // so we expect a sourceClosedId on the item element
+    ok(
+      !isNaN(closedTabItem.sourceClosedId),
+      "Item has a sourceClosedId property"
+    );
 
     // dismiss the first tab and verify the list is correctly updated
     await dismiss_tab(closedTabItem);
@@ -390,6 +396,12 @@ add_task(async function test_dismiss_tab() {
 
     // dismiss the last tab and verify the list is correctly updated
     closedTabItem = listItems[listItems.length - 1];
+    ok(
+      isNaN(closedTabItem.sourceClosedId),
+      "Item does not have a sourceClosedId property"
+    );
+    ok(closedTabItem.sourceWindowId, "Item has a sourceWindowId property");
+
     await dismiss_tab(closedTabItem);
     await listElem.getUpdateComplete;