diff --git a/src/tests/redef.exp b/src/tests/redef.exp
new file mode 100644
index 0000000..d81cc07
--- /dev/null
+++ b/src/tests/redef.exp
@@ -0,0 +1 @@
+42
diff --git a/src/tests/redef.lambda b/src/tests/redef.lambda
new file mode 100644
index 0000000..7d6f1f8
--- /dev/null
+++ b/src/tests/redef.lambda
@@ -0,0 +1,6 @@
+let increase = fun x -> x + 1 in
+let increase = fun x ->
+    let lop = (increase x) in
+    lop + 1 in
+
+print (increase 40)