async test

tests/test_shutdown.py

@@ -1,5 +1,3 @@
-import asyncio
-
 from textual.app import App
 from textual.containers import Horizontal
 from textual.widgets import Footer, Tree
@@ -11,13 +9,10 @@ class TreeApp(App[None]):
         yield Footer()
 
 
-def test_shutdown():
+async def test_shutdown():
     # regression test for https://github.com/Textualize/textual/issues/4634
     # Testing that an app with the footer doesn't deadlock
     app = TreeApp()
-
-    async def run_test():
-        async with app.run_test():
-            pass
-
-    asyncio.run(run_test())
+    print("Check for deadlock in test_shutdown.py")
+    async with app.run_test():
+        pass