diff --git a/fail2ban/tests/filtertestcase.py b/fail2ban/tests/filtertestcase.py
index c7c11f61..75f91584 100644
--- a/fail2ban/tests/filtertestcase.py
+++ b/fail2ban/tests/filtertestcase.py
@@ -224,7 +224,7 @@ class IgnoreIP(LogCaptureTestCase):
 			self.assertTrue(self.filter.inIgnoreIPList(ip))
 
 	def testIgnoreIPNOK(self):
-		ipList = "", "999.999.999.999", "abcdef", "192.168.0."
+		ipList = "", "999.999.999.999", "abcdef.abcdef", "192.168.0."
 		for ip in ipList:
 			self.filter.addIgnoreIP(ip)
 			self.assertFalse(self.filter.inIgnoreIPList(ip))