diff --git a/test/transport/test_data.py b/test/transport/test_data.py
index 6a02bca3ce..035e3afb91 100644
--- a/test/transport/test_data.py
+++ b/test/transport/test_data.py
@@ -35,6 +35,7 @@ def __init__(self, framer: ModbusFramer, comm_name="test comm"):
                 self.cb_handle_data,
             )
 
+    @pytest.mark.skipif(pytest.IS_WINDOWS, reason="Windows problem.")
     @pytest.mark.xdist_group(name="server_serialize")
     async def test_client_send(self):
         """Test connect() reconnecting."""