diff --git a/tests/factorial.ar b/tests/factorial.ar
new file mode 100644
index 0000000..d98e99d
--- /dev/null
+++ b/tests/factorial.ar
@@ -0,0 +1,10 @@
+let factorial(x) = do
+    let n = x-1
+    if (n) return x*factorial(n)
+    return 1
+
+let loop = 501
+let x = 500
+while (x) do
+    factorial(loop-x)
+    x=x-1
\ No newline at end of file
diff --git a/tests/iteration-test.py b/tests/iteration-test.py
deleted file mode 100644
index 5399247..0000000
--- a/tests/iteration-test.py
+++ /dev/null
@@ -1,3 +0,0 @@
-i = 1000000
-while i:
-  i=i-1
\ No newline at end of file
diff --git a/tests/iteration.ar b/tests/iteration.ar
new file mode 100644
index 0000000..2c929db
--- /dev/null
+++ b/tests/iteration.ar
@@ -0,0 +1,3 @@
+let i = 1e7
+while (i) do
+  i=i-1
\ No newline at end of file