Multiplication by negative is now forbidden
diff --git a/tests/suites/test_suite_ecp.function b/tests/suites/test_suite_ecp.function
index 471bbec..ff51a08 100644
--- a/tests/suites/test_suite_ecp.function
+++ b/tests/suites/test_suite_ecp.function
@@ -54,7 +54,7 @@
 END_CASE
 
 BEGIN_CASE
-ecp_small_mul:m:r_zero:x_r:y_r
+ecp_small_mul:m:r_zero:x_r:y_r:ret
 {
     ecp_group grp;
     ecp_point R;
@@ -69,7 +69,7 @@
 
     TEST_ASSERT( mpi_lset( &m, {m} ) == 0 );
 
-    TEST_ASSERT( ecp_mul( &grp, &R, &m, &grp.G ) == 0 );
+    TEST_ASSERT( ecp_mul( &grp, &R, &m, &grp.G ) == {ret} );
 
     if( {r_zero} )
         TEST_ASSERT( R.is_zero );