diff --git a/testrunner b/testrunner
index 1be2ad7..75271d5 100755
--- a/testrunner
+++ b/testrunner
@@ -20,7 +20,7 @@ case "${TYPE}" in
   *) echo "ERRRO: Unknown type '$1'" >&2 ; usage >&2 ; exit 1 ;;
 esac
 
-if ls /var/cores/core.* >/dev/null 2>&1 ; then
+if ls /var/cores/core.perl-fcgi.sig11* >/dev/null 2>&1 ; then
   echo "================== NOTE: CORE DUMP DETECTED =================="
   echo "= Removing known cores to prevent failing for the known issues:"
   echo "= 1) MT#21791: Renaming ngcp-panel cores /var/cores/core.perl-fcgi.sig11*"