diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index b40e322113..031a9ce5b5 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -500,7 +500,8 @@ requires_certificate_authentication () {
 
 adapt_cmd_for_psk () {
     case "$2" in
-        *openssl*) s='-psk abc123 -nocert';;
+        *openssl*s_server*) s='-psk abc123 -nocert';;
+        *openssl*) s='-psk abc123';;
         *gnutls-*) s='--pskkey=abc123';;
         *) s='psk=abc123';;
     esac