diff --git a/scratch/db.py b/scratch/db.py
deleted file mode 100644
index 294791d..0000000
--- a/scratch/db.py
+++ /dev/null
@@ -1,13 +0,0 @@
-from swh.storage import db
-
-# ok!
-with db.connect ('dbname=softwareheritage-dev') as db_conn:
-    with db_conn.cursor() as cur:
-        cur.execute("insert into swh.origin(type, url) values ('git', 'https://github.com/ardumont/dot-files2') returning id")
-        r = cur.fetchone()
-        print(r)
-
-# ok!
-with db.connect ('dbname=softwareheritage-dev') as db_conn:
-    r = db.insert(db_conn, "insert into swh.origin(type, url) values ('git', 'https://github.com/ardumont/dot-files2') returning id")
-    print(r)
diff --git a/scratch/futures.py b/scratch/futures.py
deleted file mode 100755
index c3914bd..0000000
--- a/scratch/futures.py
+++ /dev/null
@@ -1,54 +0,0 @@
-#!/usr/bin/env python3
-# source: https://docs.python.org/3/library/concurrent.futures.html
-
-import concurrent.futures
-import math
-
-PRIMES = [
-    112272535095293,
-    112582705942171,
-    112272535095293,
-    115280095190773,
-    115797848077099,
-    1099726899285419,
-    112272535095293,
-    112582705942171,
-    112272535095293,
-    115280095190773,
-    115797848077099,
-    1099726899285419,
-    112272535095293,
-    112582705942171,
-    112272535095293,
-    115280095190773,
-    115797848077099,
-    1099726899285419,
-    112272535095293,
-    112582705942171,
-    112272535095293,
-    115280095190773,
-    115797848077099,
-    1099726899285419,
-]
-
-def is_prime(n):
-    if n % 2 == 0:
-        return False
-
-    sqrt_n = int(math.floor(math.sqrt(n)))
-    for i in range(3, sqrt_n + 1, 2):
-        if n % i == 0:
-            return False
-    return True
-
-def main():
-    with concurrent.futures.ProcessPoolExecutor() as executor:
-        for number, prime in zip(PRIMES, executor.map(is_prime, PRIMES)):
-            print('%d is prime: %s' % (number, prime))
-
-    # sequential code
-    # for number, prime in zip(PRIMES, map(is_prime, PRIMES)):
-    #     print('%d is prime: %s' % (number, prime))
-
-if __name__ == '__main__':
-    main()
diff --git a/scratch/git_visit.py b/scratch/git_visit.py
deleted file mode 100644
index 062ebc0..0000000
--- a/scratch/git_visit.py
+++ /dev/null
@@ -1,47 +0,0 @@
-# (* OCaml: non tail-recursive version *)
-
-# let rec visit obj =
-#   if not (is_in_cache obj) then begin
-#     List.iter visit (get_parents obj);
-#     store_object obj
-#   end
-
-# let _ = visit root_obj
-
-
-# (* OCaml: (almost) tail-recursive version *)
-
-# let visit obj =
-#   let rec aux visit_todo store_todo =
-#     match visit_todo with
-#     | [] -> store_todo
-#     | obj :: rest ->
-#        if not (is_in_cache obj) then
-# 	 let parents = get_parents obj in
-#          (* "@" is not tail-rec in OCaml (length of 1st arg.), but we don't
-#             care here, as equivalent operators might be tail-rec in other
-#             languages. To be tail-rec in OCaml we would need List.rev_append
-#             here, and to do reverse gymnastic elsewhere. *)
-# 	 aux (rest @ parents) (obj :: store_todo)
-#   in
-#   let objects_to_store = aux [obj] [] in
-#   List.iter store_object objects_to_store
-
-# let _ = visit root_obj
-
-from collections import deque
-
-def visit(root_obj, cache, store):
-
-    to_visit = deque([root_obj])  # FIFO
-    to_store = deque()            # LIFO
-
-    while to_visit:  # 1st pass: visit top-down, use cache, collect to_store
-        obj = to_visit.popleft()  # extract from beginning (left)
-        if obj not in cache:
-            to_visit.extend(obj.parents)  # append to end (right)
-            to_store.append(obj)
-
-    while to_store:  # 2nd pass: store objects bottom-up
-        obj = to_store.pop()
-        store.add(obj)
diff --git a/scratch/http.py b/scratch/http.py
deleted file mode 100755
index 31dc93e..0000000
--- a/scratch/http.py
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/usr/bin/env python3
-
-import requests
-
-response = requests.get('http://localhost:5000/commits/1')
-
-print(response)
diff --git a/scratch/retry-tryout.py b/scratch/retry-tryout.py
deleted file mode 100755
index b67fabd..0000000
--- a/scratch/retry-tryout.py
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/usr/bin/env python3
-
-import random
-from retrying import retry
-
-
-@retry
-def pick_one():
-    r = random.randint(0, 10)
-    print(r)
-    if r != 1:
-        raise Exception("1 was not picked")
-
-
-if __name__ == '__main__':
-    pick_one()
diff --git a/scratch/scratch-swh-api.py b/scratch/scratch-swh-api.py
deleted file mode 100644
index 7346804..0000000
--- a/scratch/scratch-swh-api.py
+++ /dev/null
@@ -1,5 +0,0 @@
-from swh.storage import store
-from swh.protocols import serial
-from swh.client import http
-
-r = http.put('http://localhost:5000', store.Type.origin, {'url': 'https://github.com/swh/good.git', 'type': git})