diff --git a/testdata/algo/nwriter1b_au.txt b/testdata/algo/nwriter1b_au.txt
new file mode 100644
index 000000000..64dd13407
--- /dev/null
+++ b/testdata/algo/nwriter1b_au.txt
@@ -0,0 +1,14 @@
+* written by unit test
+
+* cell C1
+* pin p1
+* pin p2
+.SUBCKT C1 1 2
+* net 1 n1
+* net 2 n2
+* net 3 n3
+* device instance $1 r0 *1 0,0 RCLS
+R$1 1 3 3 1.7 RCLS
+* device instance $2 r0 *1 0,0 RCLS
+R$2 3 2 3 4.2e-05 RCLS
+.ENDS C1