diff --git a/releng/manual_devices_ts b/releng/manual_devices_ts
index 7f7a9947..543bbfd7 100755
--- a/releng/manual_devices_ts
+++ b/releng/manual_devices_ts
@@ -14,6 +14,7 @@ else
   echo >&2
   echo "File not found: inc/releng_getopts.inc" >&2
   echo "Are we in the ./releng directory of a libisoburn SVN checkout ?" >&2
+  echo "(Please execute the tests from that ./releng directory.)" >&2
   echo >&2
   exit 2
 fi