diff --git a/artiq/test/test_ctlmgr.py b/artiq/test/test_ctlmgr.py
index a0a694740..5acdcc1f9 100644
--- a/artiq/test/test_ctlmgr.py
+++ b/artiq/test/test_ctlmgr.py
@@ -50,8 +50,7 @@ class ControllerCase(unittest.TestCase):
             except asyncio.TimeoutError:
                 timeout -= dt
             except (ConnectionAbortedError, ConnectionError,
-                    ConnectionRefusedError, ConnectionResetError,
-                    OSError):
+                    ConnectionRefusedError, ConnectionResetError):
                 await asyncio.sleep(dt)
                 timeout -= dt
         raise asyncio.TimeoutError