Index: jupyter_client-7.3.4/jupyter_client/utils.py
===================================================================
--- jupyter_client-7.3.4.orig/jupyter_client/utils.py
+++ jupyter_client-7.3.4/jupyter_client/utils.py
@@ -13,12 +13,8 @@ def run_sync(coro):
         try:
             loop = asyncio.get_running_loop()
         except RuntimeError:
-            # Workaround for bugs.python.org/issue39529.
-            try:
-                loop = asyncio.get_event_loop_policy().get_event_loop()
-            except RuntimeError:
-                loop = asyncio.new_event_loop()
-                asyncio.set_event_loop(loop)
+            loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(loop)
         import nest_asyncio  # type: ignore
 
         nest_asyncio.apply(loop)