diff --git a/tests/dsa/testdsa b/tests/dsa/testdsa

index 4da172f..394d60a 100755

--- a/tests/dsa/testdsa

+++ b/tests/dsa/testdsa

@@ -23,7 +23,7 @@

 srcdir="${srcdir:-.}"

 SERV="${SERV:-../../src/gnutls-serv} -q"

 CLI="${CLI:-../../src/gnutls-cli}"

-PORT="${PORT:-5558}"

+PORT="$(((($$<<15)|RANDOM) % 63001 + 2000))"

 DEBUG=""

 unset RETCODE