diff --git a/tests/funcdefs.nct b/tests/funcdefs.nct
index 31facf7..46bba3f 100644
--- a/tests/funcdefs.nct
+++ b/tests/funcdefs.nct
@@ -1,7 +1,6 @@
-/* Currently return isn't implemented (and no ret instructions are output either) */
-/* Oh and arguments aren't supported yet either */
-/* But functions work :) */
-
-foo: u0() {
-	return 15;
+fibonacci: u32(u32 n) -> {
+	if(n <= 1) {
+		return n;
+	}
+	return fibonacci(n - 1) + fibonacci(n - 2);
 };