diff --git a/tests/suites/test_suite_asn1write.data b/tests/suites/test_suite_asn1write.data
index 7f5f536..f844d48 100644
--- a/tests/suites/test_suite_asn1write.data
+++ b/tests/suites/test_suite_asn1write.data
@@ -374,10 +374,13 @@
 store_named_data_val_found:4:9
 
 Store named data: new, val_len=0
-store_named_data_val_new:0
+store_named_data_val_new:0:1
+
+Stored named data: new, val_len=0, val=NULL
+store_named_data_val_new:0:0
 
 Store named data: new, val_len=4
-store_named_data_val_new:4
+store_named_data_val_new:4:1
 
 Store named data: new, val_len=4, val=NULL
-store_named_data_val_new:-4
+store_named_data_val_new:4:0
diff --git a/tests/suites/test_suite_asn1write.function b/tests/suites/test_suite_asn1write.function
index 8824739..597d6ac 100644
--- a/tests/suites/test_suite_asn1write.function
+++ b/tests/suites/test_suite_asn1write.function
@@ -431,7 +431,7 @@
 /* END_CASE */
 
 /* BEGIN_CASE */
-void store_named_data_val_new( int new_len )
+void store_named_data_val_new( int new_len, int set_new_val )
 {
     mbedtls_asn1_named_data *head = NULL;
     mbedtls_asn1_named_data *found = NULL;
@@ -439,10 +439,8 @@
     size_t oid_len = strlen( (const char *) oid );
     const unsigned char *new_val = (unsigned char *) "new value";
 
-    if( new_len <= 0 )
+    if( set_new_val == 0 )
         new_val = NULL;
-    if( new_len < 0 )
-        new_len = - new_len;
 
     found = mbedtls_asn1_store_named_data( &head,
                                            (const char *) oid, oid_len,