diff --git a/tests/stan/dip-005.joy b/tests/stan/dip-005.joy
new file mode 100644
index 0000000..e42b916
--- /dev/null
+++ b/tests/stan/dip-005.joy
@@ -0,0 +1 @@
+1 2 3 dip
diff --git a/tests/stan/dip-005.stderr b/tests/stan/dip-005.stderr
new file mode 100644
index 0000000..e3bf337
--- /dev/null
+++ b/tests/stan/dip-005.stderr
@@ -0,0 +1 @@
+Not a list.
diff --git a/tests/stan/dip-005.stdout b/tests/stan/dip-005.stdout
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/tests/stan/dip-005.stdout
@@ -0,0 +1 @@
+