diff --git a/tests/gold_tests/slow_post/slow_post.test.py b/tests/gold_tests/slow_post/slow_post.test.py
index 40b5795d1d3..d958708f9aa 100644
--- a/tests/gold_tests/slow_post/slow_post.test.py
+++ b/tests/gold_tests/slow_post/slow_post.test.py
@@ -41,7 +41,7 @@ def setupOriginServer(self):
         self._server.addResponse("sessionlog.json", request_header2, response_header2)
 
     def setupTS(self):
-        self._ts = Test.MakeATSProcess("ts", select_ports=False)
+        self._ts = Test.MakeATSProcess("ts", select_ports=True)
         self._ts.Disk.remap_config.AddLine(
             'map / http://127.0.0.1:{0}'.format(self._server.Variables.Port)
         )