diff --git a/performance-timeline/not-restored-reasons/performance-navigation-timing-lock.https.tentative.window.js b/performance-timeline/not-restored-reasons/performance-navigation-timing-lock.https.tentative.window.js
new file mode 100644
index 00000000000000..c2c3c0b9a624e7
--- /dev/null
+++ b/performance-timeline/not-restored-reasons/performance-navigation-timing-lock.https.tentative.window.js
@@ -0,0 +1,41 @@
+// META: title=RemoteContextHelper navigation using BFCache
+// META: script=./test-helper.js
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: timeout=long
+
+// Ensure that if WebLock is held upon entering bfcache, it cannot enter bfcache and gets reported.
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+  // Open a window with noopener so that BFCache will work.
+  const rc1 = await rcHelper.addWindow(
+      /*config=*/ null, /*options=*/ {features: 'noopener'});
+  const rc1_url = await rc1.executeScript(() => {
+    return location.href;
+  });
+
+  // Request a WebLock.
+  let return_value = await rc1.executeScript(() => {
+    return new Promise((resolve) => {
+      navigator.locks.request('resource', () => {
+        resolve(42);
+      });
+    })
+  });
+  assert_equals(return_value, 42);
+
+  // Check the BFCache result and the reported reasons.
+  await assertBFCacheEligibility(rc1, /*shouldRestoreFromBFCache=*/ false);
+  await assertNotRestoredReasonsEquals(
+      rc1,
+      /*blocked=*/ "yes",
+      /*url=*/ rc1_url,
+      /*src=*/ null,
+      /*id=*/ null,
+      /*name=*/ null,
+      /*reasons=*/['lock'],
+      /*children=*/[]);
+});
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