diff --git a/test_regress/t/t_trace_cat.pl b/test_regress/t/t_trace_cat.pl
index 78e0ece59..5444778a2 100755
--- a/test_regress/t/t_trace_cat.pl
+++ b/test_regress/t/t_trace_cat.pl
@@ -19,7 +19,8 @@ execute(
     check_finished => 1,
     );
 
-system("cat $Self->{obj_dir}/simpart*.vcd > $Self->{obj_dir}/simall.vcd");
+system("cat $Self->{obj_dir}/simpart_0000.vcd "
+       ." $Self->{obj_dir}/simpart_0000_cat*.vcd > $Self->{obj_dir}/simall.vcd");
 
 vcd_identical("$Self->{obj_dir}/simall.vcd",
               $Self->{golden_filename});