diff --git a/ft_substr_expected.output b/ft_substr_expected.output
new file mode 100644
index 0000000..9ad851f
--- /dev/null
+++ b/ft_substr_expected.output
@@ -0,0 +1,3 @@
+test 1: buff:[Lorem ipsum], start:[0], len:[10], result:[Lorem ipsu]
+test 2: buff:[Lorem ipsum], start:[7], len:[10], result:[psum]
+test 3: buff:[Lorem ipsum], start:[12], len:[10], result:[]