Rename HexParam_t -> data_t for consistent coding style
diff --git a/tests/suites/test_suite_asn1write.function b/tests/suites/test_suite_asn1write.function
index 3b2d86e..aae44a8 100644
--- a/tests/suites/test_suite_asn1write.function
+++ b/tests/suites/test_suite_asn1write.function
@@ -11,7 +11,7 @@
  */
 
 /* BEGIN_CASE */
-void mbedtls_asn1_write_octet_string( HexParam_t * str, HexParam_t * asn1,
+void mbedtls_asn1_write_octet_string( data_t * str, data_t * asn1,
                                       int buf_len, int result )
 {
     int ret;
@@ -44,7 +44,7 @@
 /* END_CASE */
 
 /* BEGIN_CASE */
-void mbedtls_asn1_write_ia5_string( char * str, HexParam_t * asn1,
+void mbedtls_asn1_write_ia5_string( char * str, data_t * asn1,
                                     int buf_len, int result )
 {
     int ret;
@@ -79,7 +79,7 @@
 /* END_CASE */
 
 /* BEGIN_CASE */
-void mbedtls_asn1_write_len( int len, HexParam_t * asn1, int buf_len,
+void mbedtls_asn1_write_len( int len, data_t * asn1, int buf_len,
                              int result )
 {
     int ret;