diff --git a/tests/50-constraint-OK.asn1 b/tests/50-constraint-OK.asn1
index d0692c5391c93cc3383fcf02ed5b2273ae3e1de8..85997ea88f38b2b12ecbe593e8f2fc2a1bfee101 100644
--- a/tests/50-constraint-OK.asn1
+++ b/tests/50-constraint-OK.asn1
@@ -45,7 +45,7 @@ BEGIN
 	SIZE-and-FROM ::= PER-Visible (SIZE(1..4) ^ FROM("ABCD"))
 	Neither-SIZE-nor-FROM ::= PER-Visible (SIZE(1..4) | FROM("ABCD",...))
 
-	Utf8-4 ::= UTF8String (FROM("A".."Z"|"a".."z"))	-- Alphabet
+	Utf8-4 ::= UTF8String (FROM("A".."Z"))		-- Alphabet
 	Utf8-3 ::= Utf8-2 (FROM("A".."Z"|"a".."z"))	-- Alphabet and size
 	Utf8-2 ::= Utf8-1 (SIZE(1..2))			-- Size
 	Utf8-1 ::= UTF8String
diff --git a/tests/50-constraint-OK.asn1.-EFprint-constraints b/tests/50-constraint-OK.asn1.-EFprint-constraints
index 3a6285850643baf9bcfa44932ee01a70a357f98e..b1b6e0ec1a0125bdd7ead6d58029632774d2fb8f 100644
Binary files a/tests/50-constraint-OK.asn1.-EFprint-constraints and b/tests/50-constraint-OK.asn1.-EFprint-constraints differ
diff --git a/tests/50-constraint-OK.asn1.-P b/tests/50-constraint-OK.asn1.-P
index f3370c24611bc002f1ad6b145bb1050c0392d49b..399868bf966617b2029c2425d6dde251dd0fe040 100644
--- a/tests/50-constraint-OK.asn1.-P
+++ b/tests/50-constraint-OK.asn1.-P
@@ -2347,7 +2347,7 @@ Utf8_3_constraint(asn_TYPE_descriptor_t *td, const void *sptr,
 	}
 	
 	size = UTF8String_length(st);
-	if(size < 0) {
+	if((ssize_t)size < 0) {
 		_ASN_ERRLOG(app_errlog, app_key,
 			"%s: UTF-8: broken encoding (%s:%d)",
 			td->name, __FILE__, __LINE__);
@@ -2482,7 +2482,7 @@ Utf8_2_constraint(asn_TYPE_descriptor_t *td, const void *sptr,
 	}
 	
 	size = UTF8String_length(st);
-	if(size < 0) {
+	if((ssize_t)size < 0) {
 		_ASN_ERRLOG(app_errlog, app_key,
 			"%s: UTF-8: broken encoding (%s:%d)",
 			td->name, __FILE__, __LINE__);