diff --git a/tests/osmo-auc-gen/osmo-auc-gen_test.err b/tests/osmo-auc-gen/osmo-auc-gen_test.err
index e69de29..46ecf2e 100644
--- a/tests/osmo-auc-gen/osmo-auc-gen_test.err
+++ b/tests/osmo-auc-gen/osmo-auc-gen_test.err
@@ -0,0 +1,9 @@
+expecting error:
+> osmo-auc-gen -3 -a milenage -r 39fa2f4e3d523d8619a73b4f65c3e14d -k EB215756028D60E3275E613320AEC880 -o FB2A3D1B360F599ABAB99DB8669F8308 -A 979498b1f72d3e28c59fa2e72f9c --ind -1
+Requested --ind 4294967295 is too large for IND bitlen of 5
+expecting error:
+> osmo-auc-gen -3 -a milenage -r 39fa2f4e3d523d8619a73b4f65c3e14d -k EB215756028D60E3275E613320AEC880 -o FB2A3D1B360F599ABAB99DB8669F8308 -A 979498b1f72d3e28c59fa2e72f9c --ind 32
+Requested --ind 32 is too large for IND bitlen of 5
+expecting error:
+> osmo-auc-gen -3 -a milenage -r 39fa2f4e3d523d8619a73b4f65c3e14d -k EB215756028D60E3275E613320AEC880 -o FB2A3D1B360F599ABAB99DB8669F8308 -A 979498b1f72d3e28c59fa2e72f9c --ind 42
+Requested --ind 42 is too large for IND bitlen of 5
diff --git a/tests/osmo-auc-gen/osmo-auc-gen_test.ok b/tests/osmo-auc-gen/osmo-auc-gen_test.ok
index a1d06f0..278c88f 100644
--- a/tests/osmo-auc-gen/osmo-auc-gen_test.ok
+++ b/tests/osmo-auc-gen/osmo-auc-gen_test.ok
@@ -96,3 +96,66 @@
 SRES:	9b36efdf
 Kc:	059a4f668f6fbe39
 SQN:	32
+
+
+> osmo-auc-gen -3 -a milenage -r 39fa2f4e3d523d8619a73b4f65c3e14d -k EB215756028D60E3275E613320AEC880 -o FB2A3D1B360F599ABAB99DB8669F8308 -A 979498b1f72d3e28c59fa2e72f9c --ind 5
+osmo-auc-gen (C) 2011-2012 by Harald Welte
+This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY
+
+RAND:	39fa2f4e3d523d8619a73b4f65c3e14d
+AUTN:	8704f5ba55d6000079267a4b347ad890
+IK:	27497388b6cb044648f396aa155b95ef
+CK:	f64735036e5871319c679f4742a75ea1
+RES:	e229c19e791f2e41
+SRES:	9b36efdf
+Kc:	059a4f668f6fbe39
+SQN:	37
+
+
+> osmo-auc-gen -3 -a milenage -r 39fa2f4e3d523d8619a73b4f65c3e14d -k EB215756028D60E3275E613320AEC880 -o FB2A3D1B360F599ABAB99DB8669F8308 -A 979498b1f72d3e28c59fa2e72f9c --ind 23
+osmo-auc-gen (C) 2011-2012 by Harald Welte
+This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY
+
+RAND:	39fa2f4e3d523d8619a73b4f65c3e14d
+AUTN:	8704f5ba55c40000129ddaa4f5016e25
+IK:	27497388b6cb044648f396aa155b95ef
+CK:	f64735036e5871319c679f4742a75ea1
+RES:	e229c19e791f2e41
+SRES:	9b36efdf
+Kc:	059a4f668f6fbe39
+SQN:	55
+
+
+> osmo-auc-gen -3 -a milenage -r 39fa2f4e3d523d8619a73b4f65c3e14d -k EB215756028D60E3275E613320AEC880 -o FB2A3D1B360F599ABAB99DB8669F8308 -A 979498b1f72d3e28c59fa2e72f9c --ind 31
+osmo-auc-gen (C) 2011-2012 by Harald Welte
+This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY
+
+RAND:	39fa2f4e3d523d8619a73b4f65c3e14d
+AUTN:	8704f5ba55cc00009d169f5ff89f6087
+IK:	27497388b6cb044648f396aa155b95ef
+CK:	f64735036e5871319c679f4742a75ea1
+RES:	e229c19e791f2e41
+SRES:	9b36efdf
+Kc:	059a4f668f6fbe39
+SQN:	63
+
+
+expecting error:
+> osmo-auc-gen -3 -a milenage -r 39fa2f4e3d523d8619a73b4f65c3e14d -k EB215756028D60E3275E613320AEC880 -o FB2A3D1B360F599ABAB99DB8669F8308 -A 979498b1f72d3e28c59fa2e72f9c --ind -1
+osmo-auc-gen (C) 2011-2012 by Harald Welte
+This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY
+
+
+
+expecting error:
+> osmo-auc-gen -3 -a milenage -r 39fa2f4e3d523d8619a73b4f65c3e14d -k EB215756028D60E3275E613320AEC880 -o FB2A3D1B360F599ABAB99DB8669F8308 -A 979498b1f72d3e28c59fa2e72f9c --ind 32
+osmo-auc-gen (C) 2011-2012 by Harald Welte
+This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY
+
+
+
+expecting error:
+> osmo-auc-gen -3 -a milenage -r 39fa2f4e3d523d8619a73b4f65c3e14d -k EB215756028D60E3275E613320AEC880 -o FB2A3D1B360F599ABAB99DB8669F8308 -A 979498b1f72d3e28c59fa2e72f9c --ind 42
+osmo-auc-gen (C) 2011-2012 by Harald Welte
+This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY
+
diff --git a/tests/osmo-auc-gen/osmo-auc-gen_test.sh b/tests/osmo-auc-gen/osmo-auc-gen_test.sh
index 132d9c3..f7fc87d 100755
--- a/tests/osmo-auc-gen/osmo-auc-gen_test.sh
+++ b/tests/osmo-auc-gen/osmo-auc-gen_test.sh
@@ -18,6 +18,16 @@
 	$osmo_auc_gen $@
 }
 
+invoke_err() {
+	echo
+	echo
+	echo expecting error:
+	echo '>' osmo-auc-gen $@
+	echo expecting error: >&2
+	echo '>' osmo-auc-gen $@ >&2
+	$osmo_auc_gen $@ && exit 1 || true
+}
+
 bytes1="6a61050765caa32c90371370e5d6dc2d"
 bytes2="1dc4f974325cce611e54f516dc1fec56"
 bytes3="2a48162ff3edca4adf0b7b5e527d6c16"
@@ -32,5 +42,13 @@
 k="EB215756028D60E3275E613320AEC880"
 opc="FB2A3D1B360F599ABAB99DB8669F8308"
 rand="39fa2f4e3d523d8619a73b4f65c3e14d"
-auts="979498b1f72d3e28c59fa2e72f9c"
+auts="979498b1f72d3e28c59fa2e72f9c" # --> SQN.MS = 23
 invoke -3 -a milenage -r $rand -k $k -o $opc -A $auts
+invoke -3 -a milenage -r $rand -k $k -o $opc -A $auts --ind 5
+invoke -3 -a milenage -r $rand -k $k -o $opc -A $auts --ind 23
+invoke -3 -a milenage -r $rand -k $k -o $opc -A $auts --ind 31
+
+# expect error: IND is too large for IND-bitlen of 5 (max 31)
+invoke_err -3 -a milenage -r $rand -k $k -o $opc -A $auts --ind -1
+invoke_err -3 -a milenage -r $rand -k $k -o $opc -A $auts --ind 32
+invoke_err -3 -a milenage -r $rand -k $k -o $opc -A $auts --ind 42