diff --git a/Cargo.lock b/Cargo.lock
index 6c6be30..3bddbb3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -91,6 +91,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b97f376d85a664d5837dbae44bf546e6477a679ff6610010f17276f686d867e8"
 dependencies = [
  "clap_builder",
+ "clap_derive",
 ]
 
 [[package]]
@@ -105,6 +106,18 @@ dependencies = [
  "strsim",
 ]
 
+[[package]]
+name = "clap_derive"
+version = "4.5.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ac6a0c7b1a9e9a5186361f67dfa1b88213572f427fb9ab038efb2bd8c582dab"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "clap_lex"
 version = "0.7.2"
@@ -230,6 +243,12 @@ version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e087f84d4f86bf4b218b927129862374b72199ae7d8657835f1e89000eea4fb"
 
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
 [[package]]
 name = "indexmap"
 version = "2.6.0"
diff --git a/Cargo.toml b/Cargo.toml
index 434b508..e00309a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,12 +7,13 @@ authors = [
     "Nicolas <nicolas.antinori.7@gmail.com>",
 ]
 edition = "2021"
+description = "A tiny version of ls command"
 
 [dependencies]
 anyhow = "1.0"
 bytes = "1.3"
+clap = { version = "4.5.20", features = ["derive"] }
 thiserror = "1.0"
-clap = "4.5.20"
 
 [dev-dependencies]
 rstest = "0.23.0"
@@ -25,4 +26,5 @@ stage0 = []
 stage1 = []
 stage2 = []
 stage3 = []
+stage4 = []
 stage5 = []
diff --git a/tests/stage4.rs b/tests/stage4.rs
new file mode 100644
index 0000000..ea30c4c
--- /dev/null
+++ b/tests/stage4.rs
@@ -0,0 +1,38 @@
+#![cfg(feature = "stage4")]
+
+mod helpers;
+
+use helpers::{split_ls_column_output, split_ls_output_by_newline};
+use rstest::rstest;
+use std::process::Command;
+
+const EXPECTED_HELP_TEXT: &str = r#"A tiny version of ls command
+
+Usage: oxidar-ls [OPTIONS] <PATH>
+
+Arguments:
+  <PATH>  Path to list
+
+Options:
+  -a, --all     Show hidden files
+  -F, --format  Format file names. Appendds a symbol at the end indicating the type of file. Slash ('/') is for directories and at sign ('@') is for symbolic links
+  -l, --list    Show the files in a list
+  -h, --human   Show the file size in a human-redable format
+      --help
+"#;
+
+#[rstest]
+#[case::arguments_help(&["--help"])]
+fn test_stage_4(#[case] ls_arguments: &[&'static str]) {
+    let output = Command::new("./target/debug/oxidar-ls")
+        .args([ls_arguments, &["./test_dir"]].concat())
+        .output()
+        .expect("failed to execute process");
+
+    assert!(output.status.success());
+
+    assert_eq!(
+        EXPECTED_HELP_TEXT,
+        std::str::from_utf8(&output.stdout).unwrap()
+    );
+}
diff --git a/tests/stage5.rs b/tests/stage5.rs
index 84c0b36..a017b71 100644
--- a/tests/stage5.rs
+++ b/tests/stage5.rs
@@ -11,6 +11,7 @@ use std::process::Command;
 #[case::arguments_lF(&["-l", "-F"])]
 #[case::arguments_lFh(&["-l", "-F", "-h"])]
 #[case::arguments_lFha(&["-l", "-F", "-h", "-a"])]
+#[case::arguments_lFha(&["-lFha"])] // This tests tha clap was introduced and works as expected
 fn test_stage_5(#[case] ls_arguments: &[&'static str]) {
     let output = Command::new("./target/debug/oxidar-ls")
         .args([ls_arguments, &["./test_dir"]].concat())