diff --git a/tests/70-xer-test-OK.asn1 b/tests/70-xer-test-OK.asn1
index 7b0770c1265dcdc428f9771c1915514578541620..19c8b6f6f57f7a7242442e918c64303635bd7824 100644
--- a/tests/70-xer-test-OK.asn1
+++ b/tests/70-xer-test-OK.asn1
@@ -21,7 +21,8 @@ BEGIN
 
 	Sequence ::= SEQUENCE {
 		integer		INTEGER,
-		sequence	Sequence OPTIONAL,	-- backreference
+		sequence	Sequence   OPTIONAL,	-- backreference
+		bits		BIT STRING OPTIONAL,
 		string		UTF8String
 	}