Index: tests/pybin/tools.py
===================================================================
--- tests/pybin/tools.py	(revision b05308311d934d0d8b5bd3010e77f9240dc4ca24)
+++ tests/pybin/tools.py	(revision 630c4bb4129d5d9f475f782e2e9362637b413639)
@@ -483,5 +483,5 @@
 
 	if not os.path.isfile(core):
-		return 1, "ERR No core dump (limit soft: {} hard: {})".format(*resource.getrlimit(resource.RLIMIT_CORE))
+		return 1, "ERR No core dump, expected '{}' (limit soft: {} hard: {})".format(core, *resource.getrlimit(resource.RLIMIT_CORE))
 
 	try: