Rename HexParam_t -> data_t for consistent coding style
diff --git a/tests/suites/test_suite_debug.function b/tests/suites/test_suite_debug.function
index f517c8a..377d630 100644
--- a/tests/suites/test_suite_debug.function
+++ b/tests/suites/test_suite_debug.function
@@ -105,7 +105,7 @@
 
 /* BEGIN_CASE */
 void mbedtls_debug_print_buf( char * file, int line, char * text,
-                              HexParam_t * data, char * result_str )
+                              data_t * data, char * result_str )
 {
     mbedtls_ssl_context ssl;
     mbedtls_ssl_config conf;