diff --git a/test_regress/t/t_flag_names.v b/test_regress/t/t_flag_names.v
index 3f9b43bb2..8f83f05ca 100644
--- a/test_regress/t/t_flag_names.v
+++ b/test_regress/t/t_flag_names.v
@@ -8,6 +8,7 @@ module t;
 endmodule
 
 module sub;
+   //verilator no_inline_module
    string scope;
    initial begin
       scope = $sformatf("%m");