Index: tests/pybin/tools.py
===================================================================
--- tests/pybin/tools.py	(revision 4f6dda063e7b3a906904ff494b7cf4bb41f5a5c5)
+++ tests/pybin/tools.py	(revision bfb9bf579373b2b7f43b0c463145ea4a8713dc77)
@@ -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: