diff --git a/libft_test/ft_isalpha_test.c b/libft_test/ft_isalpha_test.c
old mode 100644
new mode 100755
index 765c667..ec505e0
--- a/libft_test/ft_isalpha_test.c
+++ b/libft_test/ft_isalpha_test.c
@@ -1,38 +1,37 @@
-/* ************************************************************************** */
-/*                                                                            */
-/*                                                        :::      ::::::::   */
-/*   ft_isalpha_test.c                                  :+:      :+:    :+:   */
-/*                                                    +:+ +:+         +:+     */
-/*   By: tischmid <marvin@42.fr>                    +#+  +:+       +#+        */
-/*                                                +#+#+#+#+#+   +#+           */
-/*   Created: 2023/05/02 18:43:57 by tischmid          #+#    #+#             */
-/*   Updated: 2023/05/02 21:23:43 by tischmid         ###   ########.fr       */
-/*                                                                            */
-/* ************************************************************************** */
+#!/usr/bin/env bash
 
+tmp_out="$(mktemp)"
+
+grep -A9999 -- "[S]TART_OF_C_FILE" "${0}" | cc -Wall -Wextra -Werror -o "${tmp_out}" -xc "${0%_test.c}.c" -
+
+if [ ! -f "${tmp_out}" ]; then
+  printf "\e[31m%s\e[m\n" "Could not compile"
+  exit 1
+fi
+
+diff --expand-tabs --left-column --width="60" --side-by-side --label="Expected Output" --label="    Test Output" -- <("${tmp_out}" 2>&1 1>/dev/null) <("${tmp_out}" 2>/dev/null) && { printf "\e[102;30m%s\e[m\n" "All tests passed"; exit_status="0"; } || { printf "\e[101;37m%s\e[m\n" "At least one test failed"; exit_status="1"; }
+rm -f -- "${tmp_out}"
+
+exit -- "${exit_status}"
+// START_OF_C_FILE
 #include <stdio.h>
+#include <unistd.h>
+
+#define test(expected_string, func, ...) \
+    do { \
+        fprintf(stderr, "%s", expected_string); \
+        fflush(stderr); \
+        int old_stderr_fd = dup(2); \
+        dup2(1, 2); \
+        func(__VA_ARGS__); \
+        fflush(stdout); \
+        dup2(old_stderr_fd, 2); \
+    } while(0)
 
 int ft_isalpha(int c);
 
-int printf_test(const char *format, ...)
-{
-	va_list listp;
-	int		return_code;
-
-	var_start(listp, fmt);
-	fprintf(1, "%s", "<TEST>");
-	return_code = vfprintf(1, format, listp);
-	fprintf(1, "%s", "</TEST>");
-	va_end(listp);
-	return (return_code);
-}
-
-int printf_expect(const char *format, ...)
-{
-}
-
-int main(int argc, char **argv)
-{
-	printf();
-	return (0);
+int main(){
+  test("0\n", printf, "%d\n", ft_isalpha(96));
+  test("Nonzero: 2\n", printf, "Nonzero: %d\n", ft_isalpha(97));
+  return 0;
 }