diff --git a/fail2ban/tests/samplestestcase.py b/fail2ban/tests/samplestestcase.py
index fd41e51a..6ba03f5e 100644
--- a/fail2ban/tests/samplestestcase.py
+++ b/fail2ban/tests/samplestestcase.py
@@ -118,7 +118,10 @@ def testSampleRegexsFactory(name):
 				self.assertTrue(faildata.get('match', False),
 					"Line matched when shouldn't have: %s:%i %r" %
 					(logFile.filename(), logFile.filelineno(), line))
-				self.assertEqual(len(ret), 1, "Multiple regexs matched")
+				self.assertEqual(len(ret), 1,
+					"Multiple regexs matched: regexs %s for %s:%i" % (
+						",".join(["%i" % a[0] for a in ret]),
+						logFile.filename(), logFile.filelineno()))
 				# Verify timestamp and host as expected
 				failregex, host, time = ret[0]
 				self.assertEqual(host, faildata.get("host", None))