diff --git a/stl/src/xnotify.cpp b/stl/src/xnotify.cpp
index 96aebb485b2..a49c88917b8 100644
--- a/stl/src/xnotify.cpp
+++ b/stl/src/xnotify.cpp
@@ -93,8 +93,8 @@ _CRTIMP2_PURE void __cdecl _Cnd_do_broadcast_at_thread_exit() noexcept {
                 if (block->data[i].res) {
                     *block->data[i].res = 1;
                 }
-                _Mtx_unlock(block->data[i].mtx);
                 _Cnd_broadcast(block->data[i].cnd);
+                _Mtx_unlock(block->data[i].mtx);
                 block->data[i].mtx = nullptr;
                 --block->num_used;
             }
diff --git a/tests/libcxx/expected_results.txt b/tests/libcxx/expected_results.txt
index 09e58f0140b..08edafbe22b 100644
--- a/tests/libcxx/expected_results.txt
+++ b/tests/libcxx/expected_results.txt
@@ -626,11 +626,6 @@ std/thread/futures/futures.task/futures.task.members/make_ready_at_thread_exit.p
 # LWG-3120 Unclear behavior of monotonic_buffer_resource::release()
 std/utilities/utility/mem.res/mem.res.monotonic.buffer/mem.res.monotonic.buffer.mem/release_reset_initial_status.pass.cpp FAIL
 
-# LWG-3343 "Ordering of calls to unlock() and notify_all() in Effects element of notify_all_at_thread_exit() should be reversed" (Open)
-# libc++ speculatively implements LWG-3343. If we wanted to do the same thing,
-# we'd need to reverse the order of the _Mtx_unlock() and _Cnd_broadcast() calls in xnotify.cpp.
-std/thread/thread.condition/notify_all_at_thread_exit_lwg3343.pass.cpp SKIPPED
-
 
 # *** C1XX COMPILER BUGS ***
 # DevCom-1436243 VSO-1335743 constexpr new initialized array