diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index f82b4db5..75bd803 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -657,12 +657,29 @@
 		/* filter as deny is first */
 		.data = bss_lu,
 		.length = sizeof(bss_lu),
-		.result = -2,
+		.result = 1,
 		.bsc_imsi_deny = "[0-9]*",
 		.bsc_imsi_allow = "[0-9]*",
 		.nat_imsi_deny = "[0-9]*",
 		.contype = NAT_CON_TYPE_LU,
 	},
+	{
+		/* deny by nat rule */
+		.data = bss_lu,
+		.length = sizeof(bss_lu),
+		.result = -3,
+		.bsc_imsi_deny = "000[0-9]*",
+		.nat_imsi_deny = "[0-9]*",
+		.contype = NAT_CON_TYPE_LU,
+	},
+	{
+		/* deny by bsc rule */
+		.data = bss_lu,
+		.length = sizeof(bss_lu),
+		.result = -2,
+		.bsc_imsi_deny = "[0-9]*",
+		.contype = NAT_CON_TYPE_LU,
+	},
 
 };