diff --git a/tests/various/bug4082.ys b/tests/various/bug4082.ys
new file mode 100644
index 00000000000..272be2fad27
--- /dev/null
+++ b/tests/various/bug4082.ys
@@ -0,0 +1,8 @@
+read_verilog <<EOF
+module top;
+  wire a;
+  wire b;
+  assign a = b;
+endmodule
+EOF
+delete w:a