diff --git a/tools/run_tests/port_server.py b/tools/run_tests/port_server.py
index 41f862ad887..660928fbe79 100755
--- a/tools/run_tests/port_server.py
+++ b/tools/run_tests/port_server.py
@@ -81,9 +81,13 @@ def allocate_port():
   return port
 
 
+keep_running = True
+
+
 class Handler(BaseHTTPServer.BaseHTTPRequestHandler):
 
   def do_GET(self):
+    global keep_running
     if self.path == '/get':
       # allocate a new port, it will stay bound for ten minutes and until
       # it's unused
@@ -93,13 +97,21 @@ class Handler(BaseHTTPServer.BaseHTTPRequestHandler):
       p = allocate_port()
       self.log_message('allocated port %d' % p)
       self.wfile.write('%d' % p)
-    elif self.path == '/version_and_pid':
+    elif self.path == '/version':
       # fetch a version string and the current process pid
       self.send_response(200)
       self.send_header('Content-Type', 'text/plain')
       self.end_headers()
-      self.wfile.write('%s+%d' % (_MY_VERSION, os.getpid()))
+      self.wfile.write(_MY_VERSION)
+    elif self.path == '/quit':
+      self.send_response(200)
+      self.end_headers()
+      keep_running = False
+
 
+httpd = BaseHTTPServer.HTTPServer(('', args.port), Handler)
+while keep_running:
+  httpd.handle_request()
 
-BaseHTTPServer.HTTPServer(('', args.port), Handler).serve_forever()
+print 'done'
 
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 9cf52a191e3..28512a847c5 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -38,7 +38,6 @@ import json
 import multiprocessing
 import os
 import platform
-import psutil
 import random
 import re
 import subprocess
@@ -532,8 +531,7 @@ def _start_port_server(port_server_port):
   # if not running ==> start a new one
   # otherwise, leave it up
   try:
-    version, _, pid = urllib2.urlopen(
-        'http://localhost:%d/version_and_pid' % port_server_port).read().partition('+')
+    version = urllib2.urlopen('http://localhost:%d/version' % port_server_port).read()
     running = True
   except Exception:
     running = False
@@ -542,7 +540,8 @@ def _start_port_server(port_server_port):
       current_version = hashlib.sha1(f.read()).hexdigest()
       running = (version == current_version)
       if not running:
-        psutil.Process(int(pid)).terminate()
+        urllib2.urlopen('http://localhost:%d/quit' % port_server_port).read()
+        time.sleep(1)
   if not running:
     port_log = open('portlog.txt', 'w')
     port_server = subprocess.Popen(