diff --git a/src/main.rs b/src/main.rs
index 49fd6a4..dfe5715 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -74,10 +74,15 @@ pub fn run(src: &'static str) {
 pub fn main() {
     env::set_var("RUST_BACKTRACE", "1");
     let src = "
-{let x = match (-1, (2)) with {
-    (x, (y)) -> y
+let x = when {
+    false -> :no
+    nil -> {
+        let x = :no
+        x
+    }
+    :else -> :yes
 }
 x
-}    ";
+    ";
     run(src);
 }