diff --git a/test/modules/misc/lua/telnet.sh b/test/modules/misc/lua/telnet.sh
index d4bca8cdac..5716bf6f2f 100755
--- a/test/modules/misc/lua/telnet.sh
+++ b/test/modules/misc/lua/telnet.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 TELNET_FAIL="telnet_fail"
-PORT=$$
+PORT=`echo "$$+1024" | bc`
 
 killer()
 {