podczas uruchamiania testów django z selenem (bez pilota, bez xvfb) zawsze otrzymuję następujący wyjątek:

Creating test database for alias 'default'...

Traceback (most recent call last):
File "/usr/lib/python2.7/wsgiref/handlers.py", line 86, in run
self.finish_response()
File "/usr/lib/python2.7/wsgiref/handlers.py", line 127, in finish_response
self.write(data)
File "/usr/lib/python2.7/wsgiref/handlers.py", line 210, in write
self.send_headers()
File "/usr/lib/python2.7/wsgiref/handlers.py", line 268, in send_headers
self.send_preamble()
File "/usr/lib/python2.7/wsgiref/handlers.py", line 192, in send_preamble
'Date: %s\r\n' % format_date_time(time.time())
File "/usr/lib/python2.7/socket.py", line 324, in write
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 44089)
self.flush()
File "/usr/lib/python2.7/socket.py", line 303, in flush
self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 32] Broken pipe
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py", line 981, in _handle_request_noblock
self.process_request(request, client_address)
File "/usr/lib/python2.7/SocketServer.py", line 310, in process_request
self.finish_request(request, client_address)
File "/usr/lib/python2.7/SocketServer.py", line 323, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/usr/local/lib/python2.7/dist-packages/django/core/servers/basehttp.py", line 139, in __init__
----------------------------------------
super(WSGIRequestHandler, self).__init__(*args, **kwargs)
File "/usr/lib/python2.7/SocketServer.py", line 640, in __init__
self.finish()
File "/usr/lib/python2.7/SocketServer.py", line 693, in finish
self.wfile.flush()
File "/usr/lib/python2.7/socket.py", line 303, in flush
self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 32] Broken pipe

Destroying test database for alias 'default'...

Process finished with exit code 0

Testy są uruchamiane za pomocą LiveServerTestCase przy użyciu django 1.4 i selenum python-bindings 2.28.0 z Firefox WebDriver. Czy ktoś ma pomysł, jak go rozwiązać?