diff --git a/browser/base/content/test/pageActions/browser_page_action_menu.js b/browser/base/content/test/pageActions/browser_page_action_menu.js
index deb5dacee885..9ee5f8e84d11 100644
--- a/browser/base/content/test/pageActions/browser_page_action_menu.js
+++ b/browser/base/content/test/pageActions/browser_page_action_menu.js
@@ -895,8 +895,7 @@ add_task(async function sendToDevice_title() {
 
         // Add the other tab to the selection.
         gBrowser.addToMultiSelectedTabs(
-          gBrowser.getTabForBrowser(otherBrowser),
-          { isLastMultiSelectChange: true }
+          gBrowser.getTabForBrowser(otherBrowser)
         );
 
         // Open the panel again.  Now the action's title should be "Send 2 Tabs to
diff --git a/browser/base/content/test/tabs/browser_multiselect_tabs_close_other_tabs.js b/browser/base/content/test/tabs/browser_multiselect_tabs_close_other_tabs.js
index a0d901113ee4..9214fe00a4e7 100644
--- a/browser/base/content/test/tabs/browser_multiselect_tabs_close_other_tabs.js
+++ b/browser/base/content/test/tabs/browser_multiselect_tabs_close_other_tabs.js
@@ -50,7 +50,7 @@ add_task(async function withAMultiSelectedTab() {
   is(gBrowser.multiSelectedTabsCount, 2, "Two multiselected tabs");
   is(gBrowser.selectedTab, initialTab, "InitialTab is still the active tab");
 
-  gBrowser.clearMultiSelectedTabs({ isLastMultiSelectChange: false });
+  gBrowser.clearMultiSelectedTabs();
   BrowserTestUtils.removeTab(tab1);
   BrowserTestUtils.removeTab(tab4);
 });