diff --git a/bin/tests/system/isctest/asyncserver.py b/bin/tests/system/isctest/asyncserver.py
index 98fec6b663..6ec3b00f10 100644
--- a/bin/tests/system/isctest/asyncserver.py
+++ b/bin/tests/system/isctest/asyncserver.py
@@ -198,7 +198,10 @@ class AsyncServer:
     ) -> None:
         assert self._work_done
         exception = context.get("exception", RuntimeError(context["message"]))
-        self._work_done.set_exception(exception)
+        try:
+            self._work_done.set_exception(exception)
+        except asyncio.InvalidStateError:
+            pass
 
     def _setup_signals(self) -> None:
         loop = self._get_asyncio_loop()
@@ -207,7 +210,10 @@ class AsyncServer:
 
     def _signal_done(self) -> None:
         assert self._work_done
-        self._work_done.set_result(True)
+        try:
+            self._work_done.set_result(True)
+        except asyncio.InvalidStateError:
+            pass
 
     async def _listen_udp(self) -> None:
         if not self._udp_handler: