diff --git a/test/isup_codec_tests.erl b/test/isup_codec_tests.erl
index 8d44f31..9e69bf8 100644
--- a/test/isup_codec_tests.erl
+++ b/test/isup_codec_tests.erl
@@ -14,3 +14,13 @@
 grs_enc_test() ->
 	?assertEqual(?ISUP_GRS_BIN, isup_codec:encode_isup_msg(?ISUP_GRS_DEC)).
 
+-define(ISUP_IAM_BIN, <<9,0,1,16,72,0,10,3,2,10,8,131,16,41,153,36,0,128,15,10,8,3,19,148,3,
+			66,48,147,32,242,21,54,25,8,0,0,21,255,255,255,255,255,255,255,255,
+			255,255,29,69,56,203,32,0>>).
+
+-define(ISUP_IAM_DEC, {isup_msg,1,9,[{conn_ind_nature,16},{fw_call_ind,18432},{calling_cat,10},{transm_medium_req,3},{4,{party_number,3,0,undefined,1,undefined,undefined,[9,2,9,9,4,2,0,0,0,8,15]}},{10,{party_number,3,undefined,0,1,0,3,[4,9,3,0,2,4,0,3,3,9,0,2]}},{242,{21,<<54,25,8,0,0,21,255,255,255,255,255,255,255,255,255,255,29,69,56,203,32>>}}]}).
+
+iam_dec_test() ->
+	?assertEqual(?ISUP_IAM_DEC, isup_codec:parse_isup_msg(?ISUP_IAM_BIN)).
+iam_enc_test() ->
+	?assertEqual(?ISUP_IAM_BIN, isup_codec:encode_isup_msg(?ISUP_IAM_DEC)).