diff --git a/releng/README.releng b/releng/README.releng
index 6bf2c886..90d1ecf7 100644
--- a/releng/README.releng
+++ b/releng/README.releng
@@ -12,6 +12,7 @@ http://www.gnu.org/software/xorriso/
  + Read the configuration files and set up accordingly
 
 * DELIVERING A NEW TEST SCRIPT
+ + file name starts with releng_
  + mandatory options -rc [-clean]
  + well documented configuration file test.conf{.template}
  + exit code 0 on success, non-zero on failure
diff --git a/releng/run_all b/releng/run_all
index 521f5a86..a6508d1c 100755
--- a/releng/run_all
+++ b/releng/run_all
@@ -14,8 +14,8 @@ main() {
 DSTART=`date --utc`
 printf "\n$0: Started at ${DSTART}"
 E1=`date '+%s'`
-# avoid running (your)self
-for s in `ls | grep -v ${SELF}`; do
+# require ^releng_, avoid running (your)self explcitly
+for s in `ls | grep ^releng_ | grep -v ${SELF}`; do
  if [ -x ${s} ]; then
    set +e
    printf "\n$0: Running ${s}..."