Testcases
diff --git a/SVIncCompil/Testcases/Verilator/t_multitop_sig.v b/SVIncCompil/Testcases/Verilator/t_multitop_sig.v
new file mode 100644
index 0000000..cc20c32
--- /dev/null
+++ b/SVIncCompil/Testcases/Verilator/t_multitop_sig.v
@@ -0,0 +1,32 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed into the Public Domain, for any use,
+// without warranty, 2019 by Wilson Snyder.
+
+module a(in, out);
+   input in;
+   output out;
+   assign out = !in;
+   sub sub ();
+   initial $display("In '%m'");
+endmodule
+
+module b(in, out);
+   input in;
+   output out;
+   assign out = in;
+   sub sub ();
+   initial $display("In '%m'");
+endmodule
+
+module c(uniq_in, uniq_out);
+   input uniq_in;
+   output uniq_out;
+   assign uniq_out = !uniq_in;
+   sub sub ();
+   initial $display("In '%m'");
+endmodule
+
+module sub;
+   initial $display("In '%m'");
+endmodule