diff --git a/src/testdir/test18.in b/src/testdir/test18.in
new file mode 100644
index 0000000..9bfd922
--- /dev/null
+++ b/src/testdir/test18.in
@@ -0,0 +1,16 @@
+Tests for not doing smart indenting when it isn't set.
+
+STARTTEST
+:so small.vim
+:set nocin nosi ai
+/some
+2cc#test
+:?start?,$w! test.out
+:qa!
+ENDTEST
+
+start text
+		some test text
+		test text
+test text
+		test text