diff --git a/.gitignore b/.gitignore
index a384fda..7c0dd26 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 *.dex
 *.idsig
 *.jks
+/tests
diff --git a/TODO.md b/TODO.md
index a53f6fb..e5d08b5 100644
--- a/TODO.md
+++ b/TODO.md
@@ -2,3 +2,4 @@
 - tests
 - https://source.android.com/docs/core/runtime/dex-format#system-annotation
 - goto size computation
+- ord in python
diff --git a/tests/dump_class_names.py b/tests/dump_class_names.py
new file mode 100644
index 0000000..30661ee
--- /dev/null
+++ b/tests/dump_class_names.py
@@ -0,0 +1,42 @@
+import logging
+
+FORMAT = "[%(levelname)s] %(name)s %(filename)s:%(lineno)d: %(message)s"
+logging.basicConfig(format=FORMAT)
+logging.getLogger().setLevel(logging.DEBUG)
+
+import json
+import zipfile as z
+import re
+from pathlib import Path
+import argparse
+
+from androscalpel import Apk, IdType, IdMethodType, ins, DexString, IdMethod, Code, utils  # type: ignore
+
+RE_CHECK_DEXFILE = re.compile(r"classes\d*.dex")
+
+
+def is_dexfile(filename: str) -> bool:
+    return bool(RE_CHECK_DEXFILE.fullmatch(filename))
+
+
+def load_apk(path_apk: Path) -> Apk:
+    print(f"[+] Load bytecode ")
+    apk = Apk()
+    with z.ZipFile(path_apk) as zipf:
+        for file in filter(is_dexfile, zipf.namelist()):
+            print(f"[-] {file}")
+            with zipf.open(file, "r") as dex_f:
+                dex = dex_f.read()
+                apk.add_dex_file(dex)
+    return apk
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser("Dump the name of classes defined in an apk")
+    parser.add_argument("apk", type=Path)
+    args = parser.parse_args()
+    apk = load_apk(args.apk)
+    cls = list(map(str, apk.classes.keys()))
+    cls.sort()
+    for cl in cls:
+        print(str(cl))