diff --git a/collects/tests/mzscheme/net.ss b/collects/tests/mzscheme/net.ss
index 69f3557e0a..235e1c7d87 100644
--- a/collects/tests/mzscheme/net.ss
+++ b/collects/tests/mzscheme/net.ss
@@ -9,6 +9,13 @@
 (require (lib "url.ss" "net")
 	 (lib "uri-codec.ss" "net"))
 
+(let ([portno (+ 40000 (random 50))])
+  
+(define l (tcp-listen 40005))
+> (define-values (r w) (tcp-accept l))
+
+
+
 (test "a=hel%2blo+%e7%88%b8" alist->form-urlencoded '((a . "hel+lo \u7238")))
 (test '((a . "hel+lo \u7238")) form-urlencoded->alist (alist->form-urlencoded '((a . "hel+lo \u7238"))))
 (test "a=hel%2blo;b=good-bye" alist->form-urlencoded '((a . "hel+lo") (b . "good-bye")))