diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index f9e48c7c75378e..fa970b80efd9c7 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -1564,6 +1564,7 @@ def test_repr_lock(self):
         event.wait()
         self.assertEqual(f'<Lock(owner=SomeOtherProcess)>', repr(lock))
         p.terminate()
+        p.join()
 
     def test_lock(self):
         lock = self.Lock()