Rename HexParam_t -> data_t for consistent coding style
diff --git a/tests/suites/test_suite_ecdh.function b/tests/suites/test_suite_ecdh.function
index 2d71828..a2c7ced 100644
--- a/tests/suites/test_suite_ecdh.function
+++ b/tests/suites/test_suite_ecdh.function
@@ -43,8 +43,8 @@
 /* END_CASE */
 
 /* BEGIN_CASE */
-void ecdh_primitive_testvec( int id, HexParam_t * rnd_buf_A, char * xA_str,
-                             char * yA_str, HexParam_t * rnd_buf_B,
+void ecdh_primitive_testvec( int id, data_t * rnd_buf_A, char * xA_str,
+                             char * yA_str, data_t * rnd_buf_B,
                              char * xB_str, char * yB_str, char * z_str )
 {
     mbedtls_ecp_group grp;