diff --git a/cookie-store/cookieStore_delete_insecure.tentative.https.window.js b/cookie-store/cookieStore_delete_insecure.tentative.https.window.js
new file mode 100644
index 00000000000000..bb1907faf58dfd
--- /dev/null
+++ b/cookie-store/cookieStore_delete_insecure.tentative.https.window.js
@@ -0,0 +1,19 @@
+'use strict';
+
+promise_test(async t => {
+  await cookieStore.set('cookie-name', 'cookie-value', { secure: false });
+  t.add_cleanup(async () => { await cookieStore.delete('cookie-name'); });
+
+  await cookieStore.delete('cookie-name');
+  const cookie = await cookieStore.get('cookie-name');
+  assert_equals(cookie, null);
+}, 'cookieStore.delete(name) can delete an insecure cookie');
+
+promise_test(async t => {
+  await cookieStore.set('cookie-name', 'cookie-value', { secure: false });
+  t.add_cleanup(async () => { await cookieStore.delete('cookie-name'); });
+
+  await cookieStore.delete({ name: 'cookie-name' });
+  const cookie = await cookieStore.get('cookie-name');
+  assert_equals(cookie, null);
+}, 'cookieStore.delete(options) can delete an insecure cookie');
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