diff --git a/tools/http_server.py b/tools/http_server.py
index a3e6adf44e..f8c77f08b2 100755
--- a/tools/http_server.py
+++ b/tools/http_server.py
@@ -14,6 +14,7 @@ PORT = 4545
 def serve_forever():
     os.chdir(root_path)  # Hopefully the main thread doesn't also chdir.
     Handler = SimpleHTTPServer.SimpleHTTPRequestHandler
+    SocketServer.TCPServer.allow_reuse_address = True
     httpd = SocketServer.TCPServer(("", PORT), Handler)
     print "Deno test server http://localhost:%d/" % PORT
     httpd.serve_forever()