diff --git a/html/semantics/menu/tentative/focus-menu-elements-arrowoperations.html b/html/semantics/menu/tentative/focus-menu-elements-arrowoperations.html
index e58c7ad4dcbb1b..f4104a500ef73c 100644
--- a/html/semantics/menu/tentative/focus-menu-elements-arrowoperations.html
+++ b/html/semantics/menu/tentative/focus-menu-elements-arrowoperations.html
@@ -20,6 +20,14 @@
   <menuitem id="B2">Command B2</menuitem>
 </menubar>
 
+<style>
+  .nodelay menuitem {
+    interest-delay: 0s;
+  }
+  .longdelay menuitem {
+    interest-delay: 1000s;
+  }
+</style>
 
 <script>
 
@@ -29,61 +37,65 @@
 const ArrowRight = '\uE014';
 const ArrowDown = '\uE015';
 
-promise_test(async (t) => {
-  await test_driver.click(btn);
-  assert_equals(document.activeElement, btn);
-  await test_driver.send_keys(document.activeElement, Enter);
-  assert_equals(document.activeElement, btn, 'btn invoked menulist, but focus is still on btn.');
-  await test_driver.send_keys(document.activeElement, ArrowDown);
-  assert_equals(document.activeElement, A1, 'arrow down moves focus into menulist.');
-  await test_driver.send_keys(document.activeElement, ArrowDown);
-  assert_equals(document.activeElement, A2, 'arrow down changes to next menuitem.');
-  await test_driver.send_keys(document.activeElement, ArrowUp);
-  assert_equals(document.activeElement, A1, 'arrow up changes to previous menuitem.');
-  await test_driver.send_keys(document.activeElement, ArrowUp);
-  assert_equals(document.activeElement, A1, 'arrow keys do not loop.');
+[false, true].forEach(useInterest => {
+  document.body.className = useInterest ? 'nodelay' : 'longdelay';
+  const description = useInterest ? ' (no delays)' : ' (long delays)';
+  promise_test(async (t) => {
+    await test_driver.click(btn);
+    assert_equals(document.activeElement, btn);
+    await test_driver.send_keys(document.activeElement, Enter);
+    assert_equals(document.activeElement, btn, 'btn invoked menulist, but focus is still on btn.');
+    await test_driver.send_keys(document.activeElement, ArrowDown);
+    assert_equals(document.activeElement, A1, 'arrow down moves focus into menulist.');
+    await test_driver.send_keys(document.activeElement, ArrowDown);
+    assert_equals(document.activeElement, A2, 'arrow down changes to next menuitem.');
+    await test_driver.send_keys(document.activeElement, ArrowUp);
+    assert_equals(document.activeElement, A1, 'arrow up changes to previous menuitem.');
+    await test_driver.send_keys(document.activeElement, ArrowUp);
+    assert_equals(document.activeElement, A1, 'arrow keys do not loop.');
 
-  list.hidePopover();
-  await test_driver.click(btn);
-  await test_driver.send_keys(document.activeElement, ArrowDown);
-  assert_equals(document.activeElement, A1, 'arrow down moves focus into menulist.');
-  await test_driver.send_keys(document.activeElement, ArrowLeft);
-  assert_equals(document.activeElement, btn, 'arrow left close the menulist and focus on invoker.');
+    list.hidePopover();
+    await test_driver.click(btn);
+    await test_driver.send_keys(document.activeElement, ArrowDown);
+    assert_equals(document.activeElement, A1, 'arrow down moves focus into menulist.');
+    await test_driver.send_keys(document.activeElement, ArrowLeft);
+    assert_equals(document.activeElement, btn, 'arrow left close the menulist and focus on invoker.');
 
-  await test_driver.click(btn);
-  await test_driver.send_keys(document.activeElement, ArrowDown);
-  assert_equals(document.activeElement, A1, 'arrow down moves focus into menulist.');
-  await test_driver.send_keys(document.activeElement, ArrowRight);
-  assert_equals(document.activeElement, btn, 'arrow right close the menulist and focus on invoker.');
-}, 'Should use arrow keys to move between menuitems in menulist.');
+    await test_driver.click(btn);
+    await test_driver.send_keys(document.activeElement, ArrowDown);
+    assert_equals(document.activeElement, A1, 'arrow down moves focus into menulist.');
+    await test_driver.send_keys(document.activeElement, ArrowRight);
+    assert_equals(document.activeElement, btn, 'arrow right close the menulist and focus on invoker.');
+  }, `Should use arrow keys to move between menuitems in menulist${description}`);
 
-promise_test(async (t) => {
-  list.style.display = 'block';
-  await test_driver.click(btn);
-  await test_driver.send_keys(document.activeElement, ArrowDown);
-  assert_equals(document.activeElement, A1, 'arrow down moves focus into menulist.');
-  await test_driver.send_keys(document.activeElement, ArrowDown);
-  assert_equals(document.activeElement, A2, 'arrow down changes to next menuitem.');
-  await test_driver.send_keys(document.activeElement, ArrowUp);
-  assert_equals(document.activeElement, A1, 'arrow up changes to previous menuitem.');
-  await test_driver.send_keys(document.activeElement, ArrowLeft);
-  assert_equals(document.activeElement, btn, 'arrow left moves focus from menulist to invoker.');
-  list.style.display = '';
-}, 'Should use arrow keys to move between menuitems in menulist with display block.');
+  promise_test(async (t) => {
+    list.style.display = 'block';
+    await test_driver.click(btn);
+    await test_driver.send_keys(document.activeElement, ArrowDown);
+    assert_equals(document.activeElement, A1, 'arrow down moves focus into menulist.');
+    await test_driver.send_keys(document.activeElement, ArrowDown);
+    assert_equals(document.activeElement, A2, 'arrow down changes to next menuitem.');
+    await test_driver.send_keys(document.activeElement, ArrowUp);
+    assert_equals(document.activeElement, A1, 'arrow up changes to previous menuitem.');
+    await test_driver.send_keys(document.activeElement, ArrowLeft);
+    assert_equals(document.activeElement, btn, 'arrow left moves focus from menulist to invoker.');
+    list.style.display = '';
+  }, `Should use arrow keys to move between menuitems in menulist with display block${description}`);
 
-promise_test(async (t) => {
-  await test_driver.click(B1);
-  assert_equals(document.activeElement, B1);
-  await test_driver.send_keys(document.activeElement, ArrowUp);
-  assert_equals(document.activeElement, B1, 'arrow up does not change current focused element.');
-  await test_driver.send_keys(document.activeElement, ArrowDown);
-  assert_equals(document.activeElement, B1, 'arrow down does not change current focused element.');
-  await test_driver.send_keys(document.activeElement, ArrowRight);
-  assert_equals(document.activeElement, B2, 'arrow right changes to next menuitem.');
-  await test_driver.send_keys(document.activeElement, ArrowLeft);
-  assert_equals(document.activeElement, B1, 'arrow left changes to previous menuitem.');
-  await test_driver.send_keys(document.activeElement, ArrowLeft);
-  assert_equals(document.activeElement, B1, 'arrow keys do not loop.');
-}, 'Should use arrow keys to move between menuitems in menubar.');
+  promise_test(async (t) => {
+    await test_driver.click(B1);
+    assert_equals(document.activeElement, B1);
+    await test_driver.send_keys(document.activeElement, ArrowUp);
+    assert_equals(document.activeElement, B1, 'arrow up does not change current focused element.');
+    await test_driver.send_keys(document.activeElement, ArrowDown);
+    assert_equals(document.activeElement, B1, 'arrow down does not change current focused element.');
+    await test_driver.send_keys(document.activeElement, ArrowRight);
+    assert_equals(document.activeElement, B2, 'arrow right changes to next menuitem.');
+    await test_driver.send_keys(document.activeElement, ArrowLeft);
+    assert_equals(document.activeElement, B1, 'arrow left changes to previous menuitem.');
+    await test_driver.send_keys(document.activeElement, ArrowLeft);
+    assert_equals(document.activeElement, B1, 'arrow keys do not loop.');
+  }, `Should use arrow keys to move between menuitems in menubar${description}`);
+});
 
 </script>
diff --git a/html/semantics/menu/tentative/menuitem-activate.html b/html/semantics/menu/tentative/menuitem-activate.html
index fb1a3e00295418..deed0fdcfb9cfd 100644
--- a/html/semantics/menu/tentative/menuitem-activate.html
+++ b/html/semantics/menu/tentative/menuitem-activate.html
@@ -42,6 +42,9 @@
     width: 400px;
     height: 400px;
   }
+  menuitem {
+    interest-delay: 1000s;
+  }
 </style>
 
 <script>
@@ -148,15 +151,19 @@
   openMainMenu.addEventListener('click',() => (++invokerClicks));
   doNothing.addEventListener('click',() => (++itemClicks));
   let openStateAfterPointerdown = "none";
-  openMainMenu.addEventListener('pointermove',() => {
-    // There will be two move events, one before the pointerdown and one after.
-    // Just capture the one after.
-    if (openStateAfterPointerdown === "none") {
-      openStateAfterPointerdown = "first-move";
-    } else if (openStateAfterPointerdown === "first-move") {
-      openStateAfterPointerdown = mainmenu.matches(":popover-open") ? "open" : "closed";
-    }
-  },{signal: t.get_signal()});
+  let gotPointerMove = new Promise(resolve => {
+    openMainMenu.addEventListener('pointermove',async () => {
+      // There will be two move events, one before the pointerdown and one after.
+      // Just capture the one after.
+      if (openStateAfterPointerdown === "none") {
+        openStateAfterPointerdown = "first-move";
+      } else if (openStateAfterPointerdown === "first-move") {
+        await waitForRender();
+        openStateAfterPointerdown = mainmenu.matches(":popover-open") ? "open" : "closed";
+        resolve();
+      }
+    },{signal: t.get_signal()});
+  })
   await new test_driver.Actions()
     .addPointer('mouse', 'mouse')
     .pointerMove(0, 0, {origin: openMainMenu})
@@ -166,7 +173,7 @@
     .pointerMove(doNothingCoordinates.x, doNothingCoordinates.y, {})
     .pointerUp()
     .send();
-  await waitForRender();
+  await gotPointerMove;
   assert_equals(openStateAfterPointerdown,"open", "mainmenu popover should open after pointer down");
   assert_false(mainmenu.matches(":popover-open"), "mainmenu popover should be closed after interaction");
   assert_equals(invokerClicks,0, "the invoking menu didn't get a click");
diff --git a/shadow-dom/focus-navigation/menu/tentative/focus-menu-elements.html b/shadow-dom/focus-navigation/menu/tentative/focus-menu-elements.html
index fe72c069627643..5ae0506e1f92b6 100644
--- a/shadow-dom/focus-navigation/menu/tentative/focus-menu-elements.html
+++ b/shadow-dom/focus-navigation/menu/tentative/focus-menu-elements.html
@@ -20,8 +20,14 @@
  <menuitem id="A2">Command A2</menuitem>
 </menulist>
 
-<script>
+<style>
+  menuitem {
+    /* Make sure focus doesn't activate the submenu. */
+    interest-delay: 1000s;
+  }
+</style>
 
+<script>
 promise_test(async () => {
   let elements = [
     'A',
@@ -31,5 +37,4 @@
 
   await assert_focus_navigation_bidirectional(elements);
 }, 'Should focus on menuitems in menubar only.');
-
 </script>