diff --git a/service-workers/service-worker/partitioned-cookies.tentative.https.html b/service-workers/service-worker/partitioned-cookies.tentative.https.html
index ab667013a2b7f5..f1ef8729226383 100644
--- a/service-workers/service-worker/partitioned-cookies.tentative.https.html
+++ b/service-workers/service-worker/partitioned-cookies.tentative.https.html
@@ -59,6 +59,10 @@
   document.cookie = '__Host-partitioned=123; Secure; Path=/; SameSite=None; Partitioned;';
   assert_true(document.cookie.includes('__Host-partitioned=123'));
 
+  // Set an unpartitioned cookie.
+  document.cookie = 'unpartitioned=456; Secure; Path=/; SameSite=None;';
+  assert_true(document.cookie.includes('unpartitioned=456'));
+
   // Test that the partitioned cookie is available to this worker via HTTP.
   wait_promise = new Promise(resolve => {
     resolve_wait_promise = resolve;
@@ -71,6 +75,7 @@
   await wait_promise;
   assert_true(got.ok, 'Get cookies');
   assert_true(got.cookies.includes('__Host-partitioned'), 'Can access partitioned cookie via HTTP');
+  assert_true(got.cookies.includes('unpartitioned'), 'Can access unpartitioned cookie via HTTP');
 
   // Test that the partitioned cookie is available to this worker via CookieStore API.
   wait_promise = new Promise(resolve => {
@@ -95,4 +100,4 @@
 
 </script>
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/service-workers/service-worker/resources/partitioned-cookies-3p-credentialless-frame.html b/service-workers/service-worker/resources/partitioned-cookies-3p-credentialless-frame.html
index 3fdf937ae1a7f6..72043378562e8d 100644
--- a/service-workers/service-worker/resources/partitioned-cookies-3p-credentialless-frame.html
+++ b/service-workers/service-worker/resources/partitioned-cookies-3p-credentialless-frame.html
@@ -21,6 +21,9 @@
   document.cookie = '__Host-partitioned=123; Secure; Path=/; SameSite=None; Partitioned;';
   assert_true(document.cookie.includes('__Host-partitioned=123'));
 
+  // Make sure DOM cannot access the unpartitioned cookie.
+  assert_false(document.cookie.includes('unpartitioned=456'));
+
   const reg = await service_worker_unregister_and_register(t, script, scope);
   await wait_for_state(t, reg.installing, 'activated');
 
@@ -61,9 +64,32 @@
   filtered_registrations[0].active.postMessage({type: 'echo_cookies_js'});
   await wait_promise;
   assert_true(got.ok, 'Get cookies');
-  assert_true(got.cookies.includes('__Host-partitioned'), 'Can access partitioned cookie');;
+  assert_true(
+      got.cookies.includes('__Host-partitioned'),
+      'Credentialless frame worker can access partitioned cookie via JS');
+  assert_false(
+      got.cookies.includes('unpartitioned'),
+      'Credentialless frame worker cannot access unpartitioned cookie via JS');
+
+  // Test that the partitioned cookie is available to this worker via HTTP.
+  wait_promise = new Promise(resolve => {
+    resolve_wait_promise = resolve;
+  });
+  on_message = ev => {
+    got = ev.data;
+    resolve_wait_promise();
+  };
+  filtered_registrations[0].active.postMessage({ type: 'echo_cookies_http' });
+  await wait_promise;
+  assert_true(got.ok, 'Get cookies');
+  assert_true(
+      got.cookies.includes('__Host-partitioned'),
+      'Credentialless frame worker can access partitioned cookie via HTTP');
+  assert_false(
+      got.cookies.includes('unpartitioned'),
+      'Credentialless frame worker cannot access unpartitioned cookie via HTTP');
 });
 
 </script>
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/service-workers/service-worker/resources/partitioned-cookies-3p-frame.html b/service-workers/service-worker/resources/partitioned-cookies-3p-frame.html
index 6a8ed6ca989f1e..dab694f685aa22 100644
--- a/service-workers/service-worker/resources/partitioned-cookies-3p-frame.html
+++ b/service-workers/service-worker/resources/partitioned-cookies-3p-frame.html
@@ -16,6 +16,7 @@
   const absolute_scope = new URL(scope, window.location).href;
 
   assert_false(document.cookie.includes('__Host-partitioned=123'), 'DOM cannot access partitioned cookie');
+  assert_true(document.cookie.includes('unpartitioned=456'), 'DOM can access unpartitioned cookie');
 
   const reg = await service_worker_unregister_and_register(t, script, scope);
   await wait_for_state(t, reg.installing, 'activated');
@@ -59,7 +60,10 @@
   assert_true(got.ok, 'Get cookies');
   assert_false(
       got.cookies.includes('__Host-partitioned'),
-      'Worker cannot access partitioned cookie');
+      'Worker cannot access partitioned cookie via HTTP');
+  assert_true(
+      got.cookies.includes('unpartitioned'),
+      'Worker can access unpartitioned cookie via HTTP');
 
   // Test that the partitioned cookie is not available to this worker via CookieStore API.
   wait_promise = new Promise(resolve => {
@@ -74,9 +78,12 @@
   assert_true(got.ok, 'Get cookies');
   assert_false(
       got.cookies.includes('__Host-partitioned'),
-      'Worker cannot access partitioned cookie');
+      'Worker cannot access partitioned cookie via JS');
+  assert_true(
+      got.cookies.includes('unpartitioned'),
+      'Worker can access unpartitioned cookie via JS');
 });
 
 </script>
 </body>
-</html>
\ No newline at end of file
+</html>