Index: anyio-3.6.2/src/anyio/_backends/_trio.py
===================================================================
--- anyio-3.6.2.orig/src/anyio/_backends/_trio.py
+++ anyio-3.6.2/src/anyio/_backends/_trio.py
@@ -161,7 +161,7 @@ current_time = trio.current_time
 #
 
 
-class ExceptionGroup(BaseExceptionGroup, trio.MultiError):
+class ExceptionGroup(BaseExceptionGroup):
     pass
 
 
@@ -185,7 +185,7 @@ class TaskGroup(abc.TaskGroup):
     ) -> Optional[bool]:
         try:
             return await self._nursery_manager.__aexit__(exc_type, exc_val, exc_tb)
-        except trio.MultiError as exc:
+        except ExceptionGroup as exc:
             raise ExceptionGroup(exc.exceptions) from None
         finally:
             self._active = False