diff --git a/html/semantics/popovers/popover-attribute-basic.tentative.html b/html/semantics/popovers/popover-attribute-basic.tentative.html
index ebfba69c5a6d43..3bf3905dac3f7b 100644
--- a/html/semantics/popovers/popover-attribute-basic.tentative.html
+++ b/html/semantics/popovers/popover-attribute-basic.tentative.html
@@ -62,9 +62,15 @@
     popover.hidePopover();
     assertPopoverVisibility(popover, /*isPopover*/true, /*expectedVisibility*/false, 'After hidePopover(), a popover should be hidden');
     assert_throws_dom("InvalidStateError",() => popover.hidePopover(),'Calling hidePopover on a hidden popover should throw InvalidStateError');
+    popover.togglePopover();
+    assertPopoverVisibility(popover, /*isPopover*/true, /*expectedVisibility*/true, 'After togglePopover() on hidden popover, it should be visible');
+    popover.togglePopover();
+    assertPopoverVisibility(popover, /*isPopover*/true, /*expectedVisibility*/false, 'After togglePopover() on visible popover, it should be hidden');
     const parent = popover.parentElement;
     popover.remove();
     assert_throws_dom("InvalidStateError",() => popover.showPopover(),'Calling showPopover on a disconnected popover should throw InvalidStateError');
+    assert_throws_dom("InvalidStateError",() => popover.hidePopover(),'Calling hidePopover on a disconnected popover should throw InvalidStateError');
+    assert_throws_dom("InvalidStateError",() => popover.togglePopover(),'Calling hidePopover on a disconnected popover should throw InvalidStateError');
     parent.appendChild(popover);
   }
   function assertNotAPopover(nonPopover) {
@@ -76,6 +82,8 @@
     assertPopoverVisibility(nonPopover, /*isPopover*/false, expectVisible, 'Calling showPopover on a non-popover should leave it visible');
     assert_throws_dom("NotSupportedError",() => nonPopover.hidePopover(),'Calling hidePopover on a non-popover should throw NotSupportedError');
     assertPopoverVisibility(nonPopover, /*isPopover*/false, expectVisible, 'Calling hidePopover on a non-popover should leave it visible');
+    assert_throws_dom("NotSupportedError",() => nonPopover.togglePopover(),'Calling togglePopover on a non-popover should throw NotSupportedError');
+    assertPopoverVisibility(nonPopover, /*isPopover*/false, expectVisible, 'Calling togglePopover on a non-popover should leave it visible');
   }
 
   // Start with the provided examples: