diff --git a/test-inputs/efficient-fibonacci.flup b/test-inputs/efficient-fibonacci.flup
new file mode 100644
index 0000000..9ff7b63
--- /dev/null
+++ b/test-inputs/efficient-fibonacci.flup
@@ -0,0 +1,9 @@
+fib: int n -> int
+    | 1 -> fib: int a int b int iterations -> int
+		| iterations 0 == -> a b +
+		| 1               -> a b + println	b a b + iterations 1 - fib
+		;
+	1 1 n fib
+    ;
+
+50 fib println
diff --git a/test-inputs/fibonacci.flup b/test-inputs/fibonacci.flup
new file mode 100644
index 0000000..eb742d0
--- /dev/null
+++ b/test-inputs/fibonacci.flup
@@ -0,0 +1,7 @@
+fib: int a -> int
+    | a 0 == -> 1
+    | a 1 == -> 1
+    | 1 1 == -> a 1 - fib a 2 - fib + duplicate println
+    ;
+
+10 fib
\ No newline at end of file