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diff --git a/testing/web-platform/tests/navigation-api/updateCurrentEntry-method/basic.html b/testing/web-platform/tests/navigation-api/updateCurrentEntry-method/basic.html
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+++ b/testing/web-platform/tests/navigation-api/updateCurrentEntry-method/basic.html
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+<!doctype html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script>
+async_test(t => {
+ navigation.onnavigate = t.unreached_func("navigate must not fire");
+ navigation.onnavigatesuccess = t.unreached_func("navigatesuccess must not fire");
+ navigation.onnavigateerror = t.unreached_func("navigateerror must not fire");
+
+ assert_equals(navigation.currentEntry.getState(), undefined, "Navigation API state starts out as undefined");
+ assert_equals(history.state, null, "history.state starts out as null");
+
+ const newState = { key: "value" };
+
+ navigation.updateCurrentEntry({ state: newState });
+
+ assert_equals(navigation.currentEntry.getState().key, "value");
+ assert_not_equals(navigation.currentEntry.getState(), newState);
+ assert_equals(history.state, null);
+
+ // Wait a tick to make sure no events fire asynchronously.
+ t.step_timeout(() => t.done(), 0);
+}, "updateCurrentEntry() works as expected");
+</script>