diff --git a/tests/lean/run/29.lean b/tests/lean/run/29.lean
new file mode 100644
index 0000000000..605f2ce0c4
--- /dev/null
+++ b/tests/lean/run/29.lean
@@ -0,0 +1,6 @@
+new_frontend
+
+def foo : Nat -> Nat -> Nat -> List Nat
+| _, _, 0   => [1]
+| 0, _, _   => [2]
+| n, d, k+1 => foo n d k