diff --git a/mottool/mottest.py b/mottool/mottest.py
new file mode 100644
index 0000000..b9c742b
--- /dev/null
+++ b/mottool/mottest.py
@@ -0,0 +1,119 @@
+#!/usr/bin/env python3
+import os
+from pathlib import Path
+import shutil
+from time import time
+
+
+__version__ = "0.0.1"
+__author__ = "rigodron, algoflash, GGLinnk, CrystalPixel"
+__license__ = "MIT"
+__status__ = "developpement"
+
+
+afs_path            = Path("../z_all_unpacked/afs_usa/root")
+mots_path            = Path("mot")
+
+# Created tmp paths
+unpack_path         = Path("unpack")
+unpack2_path        = Path("unpack2")
+repack_path         = Path("repack")
+
+
+def compare_files(file1_path:Path, file2_path:Path):
+    "Compare two files."
+    CLUSTER_LEN = 131072
+    with file1_path.open("rb") as file1, file2_path.open("rb") as file2:
+        # Init
+        bytes1 = file1.read(CLUSTER_LEN)
+        bytes2 = file2.read(CLUSTER_LEN)
+        while bytes1 or bytes2: # continue if bytes1 and bytes2 have a len > 0
+            if bytes1 != bytes2:
+                return False
+            bytes1 = file1.read(CLUSTER_LEN)
+            bytes2 = file2.read(CLUSTER_LEN)
+    return True
+
+
+def compare_folders(folder1: Path, folder2: Path, compare_mtime:bool = False):
+    """
+    compare two folder
+        -> raise an exception if there is a difference in paths or in file content
+    """
+    folder1_tmp_paths = list(folder1.glob("**/*"))
+    folder1_file_count = len(folder1_tmp_paths)
+    print(f"compare \"{folder1}\" - \"{folder2}\" ({folder1_file_count} files)")
+    if folder1_file_count == 0:
+        raise Exception(f"Error - Empty folder: {folder1}")
+
+    len1 = len(folder1.parts)
+    len2 = len(folder2.parts)
+    # 1. Compare names in filesystems
+    folder1_paths = [Path(*path.parts[len1:]) for path in folder1_tmp_paths]
+    folder2_paths = [Path(*path.parts[len2:]) for path in folder2.glob("**/*")]
+    if folder1_paths != folder2_paths:
+        print_paths_differences(folder1_paths, folder2_paths)
+        raise Exception(f"Error - Folders \"{folder1}\" and \"{folder2}\" are different (not the same folders or files names).")
+    # 2. Compare files content
+    for path1 in folder1_tmp_paths:
+        if path1.is_file():
+            path2 = folder2 / Path(*path1.parts[len1:])
+            if path1.read_bytes() != path2.read_bytes():
+                raise Exception(f"Error - \"{path1}\" and \"{path2}\" are different.")
+
+
+##################################################
+# gcmtool.py commands wrappers
+##################################################
+def mottool_unpack(mot_path:Path, folder_path:Path):
+    if os.system(f"python mottool.py -u \"{mot_path}\" \"{folder_path}\"") != 0:
+        raise Exception("Error while unpacking MOT file.")
+def mottool_pack(folder_path:Path, mot_path:Path):
+    if os.system(f"python mottool.py -p \"{folder_path}\" \"{mot_path}\"") != 0:
+        raise Exception("Error while packing MOT folder.")
+
+
+TEST_COUNT = 1
+
+
+start = time()
+print("###############################################################################")
+print("# Checking tests folder")
+print("###############################################################################")
+# Check if tests folders exist
+if unpack_path.is_dir() or unpack2_path.is_dir() or repack_path.is_dir():
+    raise Exception(f"Error - Please remove:\n-{unpack_path}\n-{unpack2_path}\n-{repack_path}")
+
+if not mots_path.is_dir():
+    mots_path.mkdir()
+    for mot_path in afs_path.glob("*mot.bin"):
+        shutil.copy(mot_path, mots_path / mot_path.name)
+
+print("###############################################################################")
+print(f"# TEST 1/{TEST_COUNT}")
+print("# Comparing [mots_path]->unpack->[repack]")
+print("###############################################################################")
+# unpack ROM in unpack_path
+unpack_path.mkdir(parents=True)
+repack_path.mkdir(parents=True)
+for mot_path in mots_path.glob("*"):
+    mottool_unpack(mot_path, unpack_path / mot_path.name)
+
+for folder_path in unpack_path.glob("*"):
+    mottool_pack(folder_path, (repack_path / folder_path.name).with_suffix(".bin"))
+
+compare_folders(mots_path, repack_path)
+
+print("Correct unpack repack.")
+
+print("###############################################################################")
+print(f"# Cleaning test folders.")
+print("###############################################################################")
+# Remove tests folders
+shutil.rmtree(unpack_path)
+shutil.rmtree(repack_path)
+
+end = time()
+print("###############################################################################")
+print(f"# All tests are OK - elapsed time: {end - start}")
+print("###############################################################################")