diff --git a/Makefile b/Makefile
index 19d7f0e..701c1fe 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 #    By: lalgarra <lalgarra@student.42madrid.com>   +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2025/10/03 18:03:12 by lalgarra          #+#    #+#              #
-#    Updated: 2025/10/07 18:46:48 by lalgarra         ###   ########.fr        #
+#    Updated: 2025/10/08 19:27:12 by lalgarra         ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -22,7 +22,7 @@ TESTS := ft_isalpha_test ft_isdigit_test ft_isalnum_test ft_isascii_test \
 	ft_memset_test ft_bzero_test ft_memcpy_test ft_calloc_test \
 	ft_memmove_test ft_strlcpy_test ft_strlcat_test ft_strchr_test \
 	ft_strrchr_test ft_strncmp_test ft_memcmp_test ft_strnstr_test \
-	ft_atoi_test 
+	ft_atoi_test ft_substr_test
 
 %_test : %_test.c
 	$(CC) $(CFLAGS) $*_test.c -L$(LIBDIR) -lft -o $*_test