diff --git a/tests/suites/test_suite_ecdh.function b/tests/suites/test_suite_ecdh.function
index 6f2d399..105f99c 100644
--- a/tests/suites/test_suite_ecdh.function
+++ b/tests/suites/test_suite_ecdh.function
@@ -99,11 +99,15 @@
                                    &rnd_pseudo_rand, &rnd_info ) == 0 );
     TEST_ASSERT( ecdh_read_params( &cli, &vbuf, buf + len ) == 0 );
 
-    memset( buf, 0x00, sizeof( buf ) ); vbuf = buf;
+    memset( buf, 0x00, sizeof( buf ) );
     TEST_ASSERT( ecdh_make_public( &cli, &len, buf, 1000,
                                    &rnd_pseudo_rand, &rnd_info ) == 0 );
     TEST_ASSERT( ecdh_read_public( &srv, buf, len ) == 0 );
 
+    TEST_ASSERT( ecdh_calc_secret( &srv, &len, buf, 1000 ) == 0 );
+    TEST_ASSERT( ecdh_calc_secret( &cli, &len, buf, 1000 ) == 0 );
+    TEST_ASSERT( mpi_cmp_mpi( &srv.z, &cli.z ) == 0 );
+
     ecdh_free( &srv );
     ecdh_free( &cli );
 }