diff --git a/qa/rpc-tests/test_framework/test_framework.py b/qa/rpc-tests/test_framework/test_framework.py
index 3480de6c6..091378186 100755
--- a/qa/rpc-tests/test_framework/test_framework.py
+++ b/qa/rpc-tests/test_framework/test_framework.py
@@ -115,6 +115,8 @@ class BitcoinTestFramework(object):
         self.add_options(parser)
         (self.options, self.args) = parser.parse_args()
 
+        self.options.tmpdir += '/' + str(self.options.port_seed)
+
         if self.options.trace_rpc:
             logging.basicConfig(level=logging.DEBUG, stream=sys.stdout)