diff --git a/Arrangement_on_surface_2/test/Arrangement_on_surface_2/cgal_test_base b/Arrangement_on_surface_2/test/Arrangement_on_surface_2/cgal_test_base
index d892d1a7747..0e265922a00 100755
--- a/Arrangement_on_surface_2/test/Arrangement_on_surface_2/cgal_test_base
+++ b/Arrangement_on_surface_2/test/Arrangement_on_surface_2/cgal_test_base
@@ -718,7 +718,8 @@ test_non_caching_segment_traits()
     else
 	execute_commands_old_structure segments non_caching_segment_traits \
 	    VERTEX IS_VERTICAL COMPARE_Y_AT_X COMPARE_Y_AT_X_LEFT CONSTRUCTOR \
-	    BOUNDARY_NEAR_X BOUNDARY_NEAR_Y COMPARE_Y_AT_X_RIGHT ARE_MERGEABLE
+	    BOUNDARY_NEAR_X BOUNDARY_NEAR_Y COMPARE_Y_AT_X_RIGHT \
+	    ARE_MERGEABLE ERRORS
 
 	execute_commands_new_structure segments segment_traits \
 	    IS_VERTICAL COMPARE_Y_AT_X COMPARE_Y_AT_X_LEFT