diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 35637457..c001fc7c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -27,10 +27,10 @@ test:
         - sed -i.bak -E 's;^REDIS_PASSWD = .*$;REDIS_PASSWD = "";' cof/settings/secret.py
         # Remove the old test database if it has not been done yet
         - psql --username=$POSTGRES_USER --host=$DBHOST -c "DROP DATABASE IF EXISTS test_$POSTGRES_DB"
-        - pip install --upgrade -r requirements.txt coverage
+        - pip install --upgrade -r requirements.txt coverage tblib
         - python --version
     script:
-        - coverage run manage.py test
+        - coverage run manage.py test --parallel
     after_script:
         - coverage report
     services:
@@ -52,9 +52,9 @@ linters:
         - pip install --upgrade black isort flake8
     script:
         - black --check .
-        - isort --recursive --check-only --diff bda cof gestioncof kfet provisioning shared utils
+        - isort --recursive --check-only --diff bda cof gestioncof kfet petitscours provisioning shared utils
         # Print errors only
-        - flake8 --exit-zero bda cof gestioncof kfet provisioning shared utils
+        - flake8 --exit-zero bda cof gestioncof kfet petitscours provisioning shared utils
     cache:
         key: linters
         paths:
diff --git a/bda/tests/test_views.py b/bda/tests/test_views.py
index 6bfa3257..7204a320 100644
--- a/bda/tests/test_views.py
+++ b/bda/tests/test_views.py
@@ -60,24 +60,20 @@ class BdATestHelpers:
     def check_restricted_access(
         self, url, validate_user=user_is_cof, redirect_url=None
     ):
-        def craft_redirect_url(user):
-            if redirect_url:
-                return redirect_url
+        for (user, client) in self.client_matrix:
+            resp = client.get(url, follow=True)
+            if validate_user(user):
+                self.assertEqual(200, resp.status_code)
+            elif redirect_url:
+                self.assertRedirects(resp, redirect_url)
             elif user is None:
                 # client is not logged in
                 login_url = "/login"
                 if url:
                     login_url += "?{}".format(urlencode({"next": url}, safe="/"))
-                return login_url
+                self.assertRedirects(resp, login_url)
             else:
-                return "/"
-
-        for (user, client) in self.client_matrix:
-            resp = client.get(url, follow=True)
-            if validate_user(user):
-                self.assertEqual(200, resp.status_code)
-            else:
-                self.assertRedirects(resp, craft_redirect_url(user))
+                self.assertEqual(403, resp.status_code)
 
 
 class TestBdAViews(BdATestHelpers, TestCase):
diff --git a/cof/settings/common.py b/cof/settings/common.py
index 22bb5afa..003cd6ce 100644
--- a/cof/settings/common.py
+++ b/cof/settings/common.py
@@ -68,6 +68,7 @@ INSTALLED_APPS = [
     "django.contrib.admin",
     "django.contrib.admindocs",
     "bda",
+    "petitscours",
     "captcha",
     "django_cas_ng",
     "bootstrapform",
diff --git a/cof/urls.py b/cof/urls.py
index 4038466f..19a0581f 100644
--- a/cof/urls.py
+++ b/cof/urls.py
@@ -21,7 +21,6 @@ from gestioncof.urls import (
     clubs_patterns,
     events_patterns,
     export_patterns,
-    petitcours_patterns,
     surveys_patterns,
 )
 
@@ -35,7 +34,7 @@ urlpatterns = [
     # Les exports
     url(r"^export/", include(export_patterns)),
     # Les petits cours
-    url(r"^petitcours/", include(petitcours_patterns)),
+    url(r"^petitcours/", include("petitscours.urls")),
     # Les sondages
     url(r"^survey/", include(surveys_patterns)),
     # Evenements
diff --git a/gestioncof/admin.py b/gestioncof/admin.py
index e89d4271..f0fd2a43 100644
--- a/gestioncof/admin.py
+++ b/gestioncof/admin.py
@@ -20,7 +20,7 @@ from gestioncof.models import (
     SurveyQuestion,
     SurveyQuestionAnswer,
 )
-from gestioncof.petits_cours_models import (
+from petitscours.models import (
     PetitCoursAbility,
     PetitCoursAttribution,
     PetitCoursAttributionCounter,
diff --git a/gestioncof/decorators.py b/gestioncof/decorators.py
index ef811730..37d93c7f 100644
--- a/gestioncof/decorators.py
+++ b/gestioncof/decorators.py
@@ -1,23 +1,55 @@
-from django.contrib.auth.decorators import user_passes_test
+from functools import wraps
+
+from django.contrib.auth.decorators import login_required, user_passes_test
+from django.core.exceptions import PermissionDenied
+from django.shortcuts import render
 
 
-def is_cof(user):
-    try:
-        profile = user.profile
-        return profile.is_cof
-    except Exception:
-        return False
+def cof_required(view_func):
+    """Décorateur qui vérifie que l'utilisateur est connecté et membre du COF.
+
+     - Si l'utilisteur n'est pas connecté, il est redirigé vers la page de
+       connexion
+     - Si l'utilisateur est connecté mais pas membre du COF, il obtient une
+       page d'erreur lui demandant de s'inscrire au COF
+    """
+
+    def is_cof(user):
+        try:
+            return user.profile.is_cof
+        except AttributeError:
+            return False
+
+    @wraps(view_func)
+    def _wrapped_view(request, *args, **kwargs):
+        if is_cof(request.user):
+            return view_func(request, *args, **kwargs)
+
+        return render(request, "cof-denied.html", status=403)
+
+    return login_required(_wrapped_view)
 
 
-cof_required = user_passes_test(is_cof)
+def buro_required(view_func):
+    """Décorateur qui vérifie que l'utilisateur est connecté et membre du burô.
 
+     - Si l'utilisateur n'est pas connecté, il est redirigé vers la page de
+       connexion
+     - Si l'utilisateur est connecté mais pas membre du burô, il obtient une
+       page d'erreur 403 Forbidden
+    """
 
-def is_buro(user):
-    try:
-        profile = user.profile
-        return profile.is_buro
-    except Exception:
-        return False
+    def is_buro(user):
+        try:
+            return user.profile.is_buro
+        except AttributeError:
+            return False
 
+    @wraps(view_func)
+    def _wrapped_view(request, *args, **kwargs):
+        if is_buro(request.user):
+            return view_func(request, *args, **kwargs)
 
-buro_required = user_passes_test(is_buro)
+        return render(request, "buro-denied.html", status=403)
+
+    return login_required(_wrapped_view)
diff --git a/gestioncof/management/commands/loaddevdata.py b/gestioncof/management/commands/loaddevdata.py
index 44d77065..05336050 100644
--- a/gestioncof/management/commands/loaddevdata.py
+++ b/gestioncof/management/commands/loaddevdata.py
@@ -14,7 +14,7 @@ from django.contrib.auth.models import User
 from django.core.management import call_command
 
 from gestioncof.management.base import MyBaseCommand
-from gestioncof.petits_cours_models import (
+from petitscours.models import (
     LEVELS_CHOICES,
     PetitCoursAbility,
     PetitCoursAttributionCounter,
diff --git a/gestioncof/models.py b/gestioncof/models.py
index 227fa936..98b947a1 100644
--- a/gestioncof/models.py
+++ b/gestioncof/models.py
@@ -5,7 +5,7 @@ from django.dispatch import receiver
 from django.utils.translation import ugettext_lazy as _
 
 from bda.models import Spectacle
-from gestioncof.petits_cours_models import choices_length
+from petitscours.models import choices_length
 
 TYPE_COMMENT_FIELD = (("text", _("Texte long")), ("char", _("Texte court")))
 
diff --git a/gestioncof/signals.py b/gestioncof/signals.py
index 3614b1c8..cf4b1f16 100644
--- a/gestioncof/signals.py
+++ b/gestioncof/signals.py
@@ -15,7 +15,7 @@ def messages_on_out_login(request, user, **kwargs):
 
 
 @receiver(cas_user_authenticated)
-def mesagges_on_cas_login(request, user, **kwargs):
+def messages_on_cas_login(request, user, **kwargs):
     msg = _("Connexion à GestioCOF par CAS réussie. Bienvenue {}.").format(
         user.get_short_name()
     )
diff --git a/gestioncof/templates/buro-denied.html b/gestioncof/templates/buro-denied.html
new file mode 100644
index 00000000..1e477751
--- /dev/null
+++ b/gestioncof/templates/buro-denied.html
@@ -0,0 +1,5 @@
+{% extends "base_title.html" %}
+
+{% block realcontent %}
+    <h2>Section réservée au Burô.</h2>
+{% endblock %}
diff --git a/gestioncof/tests/test_views.py b/gestioncof/tests/test_views.py
index 43ea148c..e945a87a 100644
--- a/gestioncof/tests/test_views.py
+++ b/gestioncof/tests/test_views.py
@@ -76,7 +76,7 @@ class RegistrationViewTests(ViewTestCaseMixin, TestCase):
                     "last_name": "last",
                     "email": "username@mail.net",
                     "is_cof": "1",
-                }
+                },
             ),
         )
 
@@ -111,7 +111,7 @@ class RegistrationViewTests(ViewTestCaseMixin, TestCase):
                     "email": "user@mail.net",
                     "is_cof": "1",
                     "user_exists": "1",
-                }
+                },
             ),
         )
 
@@ -137,7 +137,7 @@ class RegistrationViewTests(ViewTestCaseMixin, TestCase):
 
         data = dict(
             self._minimal_data,
-            **{"username": u.username, "email": "user@mail.net", "user_exists": "1"}
+            **{"username": u.username, "email": "user@mail.net", "user_exists": "1"},
         )
         if is_cof:
             data["is_cof"] = "1"
@@ -197,7 +197,7 @@ class RegistrationViewTests(ViewTestCaseMixin, TestCase):
                     "events-0-option_{}".format(o2.pk): [str(oc3.pk)],
                     "events-0-comment_{}".format(cf1.pk): "comment 1",
                     "events-0-comment_{}".format(cf2.pk): "",
-                }
+                },
             ),
         )
 
diff --git a/gestioncof/urls.py b/gestioncof/urls.py
index c4414fa5..e1e36a17 100644
--- a/gestioncof/urls.py
+++ b/gestioncof/urls.py
@@ -1,8 +1,7 @@
 from django.conf.urls import url
 
-from gestioncof import petits_cours_views, views
+from gestioncof import views
 from gestioncof.decorators import buro_required
-from gestioncof.petits_cours_views import DemandeDetailView, DemandeListView
 
 export_patterns = [
     url(r"^members$", views.export_members, name="cof.membres_export"),
@@ -21,40 +20,6 @@ export_patterns = [
     url(r"^mega$", views.export_mega, name="cof.mega_export"),
 ]
 
-petitcours_patterns = [
-    url(
-        r"^inscription$",
-        petits_cours_views.inscription,
-        name="petits-cours-inscription",
-    ),
-    url(r"^demande$", petits_cours_views.demande, name="petits-cours-demande"),
-    url(
-        r"^demande-raw$",
-        petits_cours_views.demande_raw,
-        name="petits-cours-demande-raw",
-    ),
-    url(
-        r"^demandes$",
-        buro_required(DemandeListView.as_view()),
-        name="petits-cours-demandes-list",
-    ),
-    url(
-        r"^demandes/(?P<pk>\d+)$",
-        buro_required(DemandeDetailView.as_view()),
-        name="petits-cours-demande-details",
-    ),
-    url(
-        r"^demandes/(?P<demande_id>\d+)/traitement$",
-        petits_cours_views.traitement,
-        name="petits-cours-demande-traitement",
-    ),
-    url(
-        r"^demandes/(?P<demande_id>\d+)/retraitement$",
-        petits_cours_views.retraitement,
-        name="petits-cours-demande-retraitement",
-    ),
-]
-
 surveys_patterns = [
     url(
         r"^(?P<survey_id>\d+)/status$",
diff --git a/kfet/open/tests.py b/kfet/open/tests.py
index 75a9bf8a..b4481994 100644
--- a/kfet/open/tests.py
+++ b/kfet/open/tests.py
@@ -1,4 +1,5 @@
 import json
+import threading
 from datetime import timedelta
 from unittest import mock
 
@@ -8,7 +9,7 @@ from django.contrib.auth.models import AnonymousUser, Permission, User
 from django.test import Client
 from django.utils import timezone
 
-from . import OpenKfet, kfet_open
+from . import OpenKfet
 from .consumers import OpenKfetConsumer
 
 
@@ -16,10 +17,10 @@ class OpenKfetTest(ChannelTestCase):
     """OpenKfet object unit-tests suite."""
 
     def setUp(self):
-        self.kfet_open = OpenKfet()
-
-    def tearDown(self):
-        self.kfet_open.clear_cache()
+        self.kfet_open = OpenKfet(
+            cache_prefix="test_kfetopen_%s" % threading.get_ident()
+        )
+        self.addCleanup(self.kfet_open.clear_cache)
 
     def test_defaults(self):
         """Default values."""
@@ -136,8 +137,14 @@ class OpenKfetViewsTest(ChannelTestCase):
         self.c_a = Client()
         self.c_a.login(username="admin", password="admin")
 
-    def tearDown(self):
-        kfet_open.clear_cache()
+        self.kfet_open = OpenKfet(
+            cache_prefix="test_kfetopen_%s" % threading.get_ident()
+        )
+        self.addCleanup(self.kfet_open.clear_cache)
+
+        views_patcher = mock.patch("kfet.open.views.kfet_open", self.kfet_open)
+        views_patcher.start()
+        self.addCleanup(views_patcher.stop)
 
     def test_door(self):
         """Edit raw_status."""
@@ -146,14 +153,14 @@ class OpenKfetViewsTest(ChannelTestCase):
                 "/k-fet/open/raw_open", {"raw_open": sent, "token": "plop"}
             )
             self.assertEqual(200, resp.status_code)
-            self.assertEqual(expected, kfet_open.raw_open)
+            self.assertEqual(expected, self.kfet_open.raw_open)
 
     def test_force_close(self):
         """Edit force_close."""
         for sent, expected in [(1, True), (0, False)]:
             resp = self.c_a.post("/k-fet/open/force_close", {"force_close": sent})
             self.assertEqual(200, resp.status_code)
-            self.assertEqual(expected, kfet_open.force_close)
+            self.assertEqual(expected, self.kfet_open.force_close)
 
     def test_force_close_forbidden(self):
         """Can't edit force_close without kfet.can_force_close permission."""
@@ -236,8 +243,10 @@ class OpenKfetScenarioTest(ChannelTestCase):
         self.r_c_ws = WSClient()
         self.r_c_ws.force_login(self.r)
 
-    def tearDown(self):
-        kfet_open.clear_cache()
+        self.kfet_open = OpenKfet(
+            cache_prefix="test_kfetopen_%s" % threading.get_ident()
+        )
+        self.addCleanup(self.kfet_open.clear_cache)
 
     def ws_connect(self, ws_client):
         ws_client.send_and_consume(
@@ -288,8 +297,8 @@ class OpenKfetScenarioTest(ChannelTestCase):
 
     def test_scenario_2(self):
         """Starting falsely closed, clients connect, disable force close."""
-        kfet_open.raw_open = True
-        kfet_open.force_close = True
+        self.kfet_open.raw_open = True
+        self.kfet_open.force_close = True
 
         msg = self.ws_connect(self.c_ws)
         self.assertEqual(OpenKfet.CLOSED, msg["status"])
diff --git a/kfet/tests/test_tests_utils.py b/kfet/tests/test_tests_utils.py
index 45ca2348..25046abb 100644
--- a/kfet/tests/test_tests_utils.py
+++ b/kfet/tests/test_tests_utils.py
@@ -1,3 +1,6 @@
+from decimal import Decimal
+from unittest import mock
+
 from django.contrib.auth import get_user_model
 from django.contrib.auth.models import Permission
 from django.contrib.contenttypes.models import ContentType
@@ -5,9 +8,16 @@ from django.test import TestCase
 
 from gestioncof.models import CofProfile
 
-from ..models import Account
+from ..models import Account, Article, ArticleCategory, Checkout, Operation
 from .testcases import TestCaseMixin
-from .utils import create_root, create_team, create_user, get_perms, user_add_perms
+from .utils import (
+    create_operation_group,
+    create_root,
+    create_team,
+    create_user,
+    get_perms,
+    user_add_perms,
+)
 
 User = get_user_model()
 
@@ -86,3 +96,80 @@ class PermHelpersTest(TestCaseMixin, TestCase):
             map(repr, [self.perm1, self.perm2, self.perm_team]),
             ordered=False,
         )
+
+
+class OperationHelpersTest(TestCase):
+    def test_create_operation_group(self):
+        operation_group = create_operation_group()
+
+        on_acc = Account.objects.get(cofprofile__user__username="user")
+        checkout = Checkout.objects.get(name="Checkout")
+        self.assertDictEqual(
+            operation_group.__dict__,
+            {
+                "_checkout_cache": checkout,
+                "_on_acc_cache": on_acc,
+                "_state": mock.ANY,
+                "amount": 0,
+                "at": mock.ANY,
+                "checkout_id": checkout.pk,
+                "comment": "",
+                "id": mock.ANY,
+                "is_cof": False,
+                "on_acc_id": on_acc.pk,
+                "valid_by_id": None,
+            },
+        )
+        self.assertFalse(operation_group.opes.all())
+
+    def test_create_operation_group_with_content(self):
+        article_category = ArticleCategory.objects.create(name="Category")
+        article1 = Article.objects.create(
+            category=article_category, name="Article 1", price=Decimal("2.50")
+        )
+        article2 = Article.objects.create(
+            category=article_category, name="Article 2", price=Decimal("4.00")
+        )
+        operation_group = create_operation_group(
+            content=[
+                {
+                    "type": Operation.PURCHASE,
+                    "amount": Decimal("-3.50"),
+                    "article": article1,
+                    "article_nb": 2,
+                },
+                {"type": Operation.PURCHASE, "article": article2, "article_nb": 2},
+                {"type": Operation.PURCHASE, "article": article2},
+                {"type": Operation.DEPOSIT, "amount": Decimal("10.00")},
+                {"type": Operation.WITHDRAW, "amount": Decimal("-1.00")},
+                {"type": Operation.EDIT, "amount": Decimal("7.00")},
+            ]
+        )
+
+        self.assertEqual(operation_group.amount, Decimal("0.50"))
+
+        operation_list = list(operation_group.opes.all())
+        # Passed args: with purchase, article, article_nb, amount
+        self.assertEqual(operation_list[0].type, Operation.PURCHASE)
+        self.assertEqual(operation_list[0].article, article1)
+        self.assertEqual(operation_list[0].article_nb, 2)
+        self.assertEqual(operation_list[0].amount, Decimal("-3.50"))
+        # Passed args: with purchase, article, article_nb; without amount
+        self.assertEqual(operation_list[1].type, Operation.PURCHASE)
+        self.assertEqual(operation_list[1].article, article2)
+        self.assertEqual(operation_list[1].article_nb, 2)
+        self.assertEqual(operation_list[1].amount, Decimal("-8.00"))
+        # Passed args: with purchase, article; without article_nb, amount
+        self.assertEqual(operation_list[2].type, Operation.PURCHASE)
+        self.assertEqual(operation_list[2].article, article2)
+        self.assertEqual(operation_list[2].article_nb, 1)
+        self.assertEqual(operation_list[2].amount, Decimal("-4.00"))
+        # Passed args: with deposit, amount
+        self.assertEqual(operation_list[3].type, Operation.DEPOSIT)
+        self.assertEqual(operation_list[3].amount, Decimal("10.00"))
+        # Passed args: with withdraw, amount
+        self.assertEqual(operation_list[4].type, Operation.WITHDRAW)
+        self.assertEqual(operation_list[4].amount, Decimal("-1.00"))
+        # Passed args: with edit, amount
+        self.assertEqual(operation_list[5].type, Operation.EDIT)
+        self.assertEqual(operation_list[5].amount, Decimal("7.00"))
diff --git a/kfet/tests/test_views.py b/kfet/tests/test_views.py
index bd57b6f8..e5ccfaa1 100644
--- a/kfet/tests/test_views.py
+++ b/kfet/tests/test_views.py
@@ -28,7 +28,16 @@ from ..models import (
     TransferGroup,
 )
 from .testcases import ViewTestCaseMixin
-from .utils import create_team, create_user, get_perms, user_add_perms
+from .utils import (
+    create_checkout,
+    create_checkout_statement,
+    create_inventory_article,
+    create_operation_group,
+    create_team,
+    create_user,
+    get_perms,
+    user_add_perms,
+)
 
 
 class AccountListViewTests(ViewTestCaseMixin, TestCase):
@@ -2952,6 +2961,21 @@ class KPsulPerformOperationsViewTests(ViewTestCaseMixin, TestCase):
 
 
 class KPsulCancelOperationsViewTests(ViewTestCaseMixin, TestCase):
+    """
+    Test cases for kpsul_cancel_operations view.
+
+    To test valid requests, one should use '_assertResponseOk(response)' to get
+    hints about failure reasons, if any.
+
+    At least one test per operation type should test the complete response and
+    behavior (HTTP, WebSocket, object updates, and object creations)
+    Other tests of the same operation type can only assert the specific
+    behavior differences.
+
+    For invalid requests, response errors should be tested.
+
+    """
+
     url_name = "kfet.kpsul.cancel_operations"
     url_expected = "/k-fet/k-psul/cancel_operations"
 
@@ -2960,8 +2984,790 @@ class KPsulCancelOperationsViewTests(ViewTestCaseMixin, TestCase):
     auth_user = "team"
     auth_forbidden = [None, "user"]
 
-    def test_ok(self):
-        pass
+    with_liq = True
+
+    def setUp(self):
+        super(KPsulCancelOperationsViewTests, self).setUp()
+
+        self.checkout = create_checkout(balance=Decimal("100.00"))
+        # An Article, price=2.5, stock=20
+        self.article = Article.objects.create(
+            category=ArticleCategory.objects.create(name="Category"),
+            name="Article",
+            price=Decimal("2.5"),
+            stock=20,
+        )
+        # An Account, trigramme=000, balance=50
+        # Do not assume user is cof, nor not cof.
+        self.account = self.accounts["user"]
+        self.account.balance = Decimal("50.00")
+        self.account.save()
+
+        # Mock consumer of K-Psul websocket to catch what we're sending
+        kpsul_consumer_patcher = mock.patch("kfet.consumers.KPsul")
+        self.kpsul_consumer_mock = kpsul_consumer_patcher.start()
+        self.addCleanup(kpsul_consumer_patcher.stop)
+
+    def _assertResponseOk(self, response):
+        """
+        Asserts that status code of 'response' is 200, and returns the
+        deserialized content of the JSONResponse.
+
+        In case status code is not 200, it prints the content of "errors" of
+        the response.
+
+        """
+        json_data = json.loads(getattr(response, "content", b"{}").decode("utf-8"))
+        try:
+            self.assertEqual(response.status_code, 200)
+        except AssertionError as exc:
+            msg = "Expected response is 200, got {}. Errors: {}".format(
+                response.status_code, json_data.get("errors")
+            )
+            raise AssertionError(msg) from exc
+        return json_data
+
+    def test_invalid_operation_not_int(self):
+        data = {"operations[]": ["a"]}
+        resp = self.client.post(self.url, data)
+
+        self.assertEqual(resp.status_code, 400)
+        json_data = json.loads(resp.content.decode("utf-8"))
+        self.assertEqual(json_data["errors"], {})
+
+    def test_invalid_operation_not_exist(self):
+        data = {"operations[]": ["1000"]}
+        resp = self.client.post(self.url, data)
+
+        self.assertEqual(resp.status_code, 400)
+        json_data = json.loads(resp.content.decode("utf-8"))
+        self.assertEqual(json_data["errors"], {"opes_notexisting": [1000]})
+
+    @mock.patch("django.utils.timezone.now")
+    def test_purchase(self, now_mock):
+        now_mock.return_value = self.now
+        group = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[
+                {"type": Operation.PURCHASE, "article": self.article, "article_nb": 2}
+            ],
+        )
+        operation = group.opes.get()
+        now_mock.return_value += timedelta(seconds=15)
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+
+        group = OperationGroup.objects.get()
+        self.assertDictEqual(
+            group.__dict__,
+            {
+                "_state": mock.ANY,
+                "amount": Decimal("0.00"),
+                "at": mock.ANY,
+                "checkout_id": self.checkout.pk,
+                "comment": "",
+                "id": mock.ANY,
+                "is_cof": False,
+                "on_acc_id": self.account.pk,
+                "valid_by_id": None,
+            },
+        )
+        operation = Operation.objects.get()
+        self.assertDictEqual(
+            operation.__dict__,
+            {
+                "_state": mock.ANY,
+                "addcost_amount": None,
+                "addcost_for_id": None,
+                "amount": Decimal("-5.00"),
+                "article_id": self.article.pk,
+                "article_nb": 2,
+                "canceled_at": self.now + timedelta(seconds=15),
+                "canceled_by_id": None,
+                "group_id": group.pk,
+                "id": mock.ANY,
+                "type": Operation.PURCHASE,
+            },
+        )
+
+        self.assertDictEqual(
+            json_data, {"canceled": [operation.pk], "errors": {}, "warnings": {}}
+        )
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("55.00"))
+        self.article.refresh_from_db()
+        self.assertEqual(self.article.stock, 22)
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("100.00"))
+
+        self.kpsul_consumer_mock.group_send.assert_called_with(
+            "kfet.kpsul",
+            {
+                "opegroups": [
+                    {
+                        "cancellation": True,
+                        "id": group.pk,
+                        "amount": Decimal("0.00"),
+                        "is_cof": False,
+                    }
+                ],
+                "opes": [
+                    {
+                        "cancellation": True,
+                        "id": operation.pk,
+                        "canceled_by__trigramme": None,
+                        "canceled_at": self.now + timedelta(seconds=15),
+                    }
+                ],
+                "checkouts": [],
+                "articles": [{"id": self.article.pk, "stock": 22}],
+            },
+        )
+
+    def test_purchase_with_addcost(self):
+        # TODO(AD): L'état de la balance du compte destinataire de la majoration ne
+        # devrait pas empêcher l'annulation d'une opération.
+        addcost_user = create_user(
+            "addcost", "ADD", account_attrs={"balance": Decimal("10.00")}
+        )
+        addcost_account = addcost_user.profile.account_kfet
+        group = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[
+                {
+                    "type": Operation.PURCHASE,
+                    "article": self.article,
+                    "article_nb": 2,
+                    "amount": Decimal("-6.00"),
+                    "addcost_amount": Decimal("1.00"),
+                    "addcost_for": addcost_account,
+                }
+            ],
+        )
+        operation = group.opes.get()
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        self._assertResponseOk(resp)
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("56.00"))
+        addcost_account.refresh_from_db()
+        self.assertEqual(addcost_account.balance, Decimal("9.00"))
+
+    def test_purchase_cash(self):
+        group = create_operation_group(
+            on_acc=self.accounts["liq"],
+            checkout=self.checkout,
+            content=[
+                {
+                    "type": Operation.PURCHASE,
+                    "article": self.article,
+                    "article_nb": 2,
+                    "amount": Decimal("-5.00"),
+                }
+            ],
+        )
+        operation = group.opes.get()
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        self._assertResponseOk(resp)
+
+        self.assertEqual(self.accounts["liq"].balance, Decimal("0.00"))
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("95.00"))
+
+        ws_data_checkouts = self.kpsul_consumer_mock.group_send.call_args[0][1][
+            "checkouts"
+        ]
+        self.assertListEqual(
+            ws_data_checkouts, [{"id": self.checkout.pk, "balance": Decimal("95.00")}]
+        )
+
+    def test_purchase_cash_with_addcost(self):
+        # TODO(AD): L'état de la balance du compte destinataire de la majoration ne
+        # devrait pas empêcher l'annulation d'une opération.
+        addcost_user = create_user(
+            "addcost", "ADD", account_attrs={"balance": Decimal("10.00")}
+        )
+        addcost_account = addcost_user.profile.account_kfet
+        group = create_operation_group(
+            on_acc=self.accounts["liq"],
+            checkout=self.checkout,
+            content=[
+                {
+                    "type": Operation.PURCHASE,
+                    "article": self.article,
+                    "article_nb": 2,
+                    "amount": Decimal("-6.00"),
+                    "addcost_amount": Decimal("1.00"),
+                    "addcost_for": addcost_account,
+                }
+            ],
+        )
+        operation = group.opes.get()
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        self._assertResponseOk(resp)
+
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("94.00"))
+        addcost_account.refresh_from_db()
+        self.assertEqual(addcost_account.balance, Decimal("9.00"))
+
+        ws_data_checkouts = self.kpsul_consumer_mock.group_send.call_args[0][1][
+            "checkouts"
+        ]
+        self.assertListEqual(
+            ws_data_checkouts, [{"id": self.checkout.pk, "balance": Decimal("94.00")}]
+        )
+
+    @mock.patch("django.utils.timezone.now")
+    def test_deposit(self, now_mock):
+        now_mock.return_value = self.now
+        group = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[{"type": Operation.DEPOSIT, "amount": Decimal("10.75")}],
+        )
+        operation = group.opes.get()
+        now_mock.return_value += timedelta(seconds=15)
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+
+        group = OperationGroup.objects.get()
+        self.assertDictEqual(
+            group.__dict__,
+            {
+                "_state": mock.ANY,
+                "amount": Decimal("0.00"),
+                "at": mock.ANY,
+                "checkout_id": self.checkout.pk,
+                "comment": "",
+                "id": mock.ANY,
+                "is_cof": False,
+                "on_acc_id": self.account.pk,
+                "valid_by_id": None,
+            },
+        )
+        operation = Operation.objects.get()
+        self.assertDictEqual(
+            operation.__dict__,
+            {
+                "_state": mock.ANY,
+                "addcost_amount": None,
+                "addcost_for_id": None,
+                "amount": Decimal("10.75"),
+                "article_id": None,
+                "article_nb": None,
+                "canceled_at": self.now + timedelta(seconds=15),
+                "canceled_by_id": None,
+                "group_id": group.pk,
+                "id": mock.ANY,
+                "type": Operation.DEPOSIT,
+            },
+        )
+
+        self.assertDictEqual(
+            json_data, {"canceled": [operation.pk], "errors": {}, "warnings": {}}
+        )
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("39.25"))
+        self.article.refresh_from_db()
+        self.assertEqual(self.article.stock, 20)
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("89.25"))
+
+        self.kpsul_consumer_mock.group_send.assert_called_with(
+            "kfet.kpsul",
+            {
+                "opegroups": [
+                    {
+                        "cancellation": True,
+                        "id": group.pk,
+                        "amount": Decimal("0.00"),
+                        "is_cof": False,
+                    }
+                ],
+                "opes": [
+                    {
+                        "cancellation": True,
+                        "id": operation.pk,
+                        "canceled_by__trigramme": None,
+                        "canceled_at": self.now + timedelta(seconds=15),
+                    }
+                ],
+                "checkouts": [{"id": self.checkout.pk, "balance": Decimal("89.25")}],
+                "articles": [],
+            },
+        )
+
+    @mock.patch("django.utils.timezone.now")
+    def test_withdraw(self, now_mock):
+        now_mock.return_value = self.now
+        group = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[{"type": Operation.WITHDRAW, "amount": Decimal("-10.75")}],
+        )
+        operation = group.opes.get()
+        now_mock.return_value += timedelta(seconds=15)
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+
+        group = OperationGroup.objects.get()
+        self.assertDictEqual(
+            group.__dict__,
+            {
+                "_state": mock.ANY,
+                "amount": Decimal("0.00"),
+                "at": mock.ANY,
+                "checkout_id": self.checkout.pk,
+                "comment": "",
+                "id": mock.ANY,
+                "is_cof": False,
+                "on_acc_id": self.account.pk,
+                "valid_by_id": None,
+            },
+        )
+        operation = Operation.objects.get()
+        self.assertDictEqual(
+            operation.__dict__,
+            {
+                "_state": mock.ANY,
+                "addcost_amount": None,
+                "addcost_for_id": None,
+                "amount": Decimal("-10.75"),
+                "article_id": None,
+                "article_nb": None,
+                "canceled_at": self.now + timedelta(seconds=15),
+                "canceled_by_id": None,
+                "group_id": group.pk,
+                "id": mock.ANY,
+                "type": Operation.WITHDRAW,
+            },
+        )
+
+        self.assertDictEqual(
+            json_data, {"canceled": [operation.pk], "errors": {}, "warnings": {}}
+        )
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("60.75"))
+        self.article.refresh_from_db()
+        self.assertEqual(self.article.stock, 20)
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("110.75"))
+
+        self.kpsul_consumer_mock.group_send.assert_called_with(
+            "kfet.kpsul",
+            {
+                "opegroups": [
+                    {
+                        "cancellation": True,
+                        "id": group.pk,
+                        "amount": Decimal("0.00"),
+                        "is_cof": False,
+                    }
+                ],
+                "opes": [
+                    {
+                        "cancellation": True,
+                        "id": operation.pk,
+                        "canceled_by__trigramme": None,
+                        "canceled_at": self.now + timedelta(seconds=15),
+                    }
+                ],
+                "checkouts": [{"id": self.checkout.pk, "balance": Decimal("110.75")}],
+                "articles": [],
+            },
+        )
+
+    @mock.patch("django.utils.timezone.now")
+    def test_edit(self, now_mock):
+        now_mock.return_value = self.now
+        group = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[{"type": Operation.EDIT, "amount": Decimal("-10.75")}],
+        )
+        operation = group.opes.get()
+        now_mock.return_value += timedelta(seconds=15)
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+
+        group = OperationGroup.objects.get()
+        self.assertDictEqual(
+            group.__dict__,
+            {
+                "_state": mock.ANY,
+                "amount": Decimal("0.00"),
+                "at": mock.ANY,
+                "checkout_id": self.checkout.pk,
+                "comment": "",
+                "id": mock.ANY,
+                "is_cof": False,
+                "on_acc_id": self.account.pk,
+                "valid_by_id": None,
+            },
+        )
+        operation = Operation.objects.get()
+        self.assertDictEqual(
+            operation.__dict__,
+            {
+                "_state": mock.ANY,
+                "addcost_amount": None,
+                "addcost_for_id": None,
+                "amount": Decimal("-10.75"),
+                "article_id": None,
+                "article_nb": None,
+                "canceled_at": self.now + timedelta(seconds=15),
+                "canceled_by_id": None,
+                "group_id": group.pk,
+                "id": mock.ANY,
+                "type": Operation.EDIT,
+            },
+        )
+
+        self.assertDictEqual(
+            json_data, {"canceled": [operation.pk], "errors": {}, "warnings": {}}
+        )
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("60.75"))
+        self.article.refresh_from_db()
+        self.assertEqual(self.article.stock, 20)
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("100.00"))
+
+        self.kpsul_consumer_mock.group_send.assert_called_with(
+            "kfet.kpsul",
+            {
+                "opegroups": [
+                    {
+                        "cancellation": True,
+                        "id": group.pk,
+                        "amount": Decimal("0.00"),
+                        "is_cof": False,
+                    }
+                ],
+                "opes": [
+                    {
+                        "cancellation": True,
+                        "id": operation.pk,
+                        "canceled_by__trigramme": None,
+                        "canceled_at": self.now + timedelta(seconds=15),
+                    }
+                ],
+                "checkouts": [],
+                "articles": [],
+            },
+        )
+
+    @mock.patch("django.utils.timezone.now")
+    def test_old_operations(self, now_mock):
+        kfet_config.set(cancel_duration=timedelta(minutes=10))
+        user_add_perms(self.users["team"], ["kfet.cancel_old_operations"])
+        now_mock.return_value = self.now
+        group = create_operation_group(
+            at=self.now,
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[{"type": Operation.WITHDRAW, "amount": Decimal("-10.75")}],
+        )
+        operation = group.opes.get()
+        now_mock.return_value += timedelta(minutes=10, seconds=1)
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+        self.assertEqual(len(json_data["canceled"]), 1)
+
+    @mock.patch("django.utils.timezone.now")
+    def test_invalid_old_operations_requires_perm(self, now_mock):
+        kfet_config.set(cancel_duration=timedelta(minutes=10))
+        now_mock.return_value = self.now
+        group = create_operation_group(
+            at=self.now,
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[{"type": Operation.WITHDRAW, "amount": Decimal("-10.75")}],
+        )
+        operation = group.opes.get()
+        now_mock.return_value += timedelta(minutes=10, seconds=1)
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        self.assertEqual(resp.status_code, 403)
+        json_data = json.loads(resp.content.decode("utf-8"))
+        self.assertEqual(
+            json_data["errors"],
+            {"missing_perms": ["Annuler des commandes non récentes"]},
+        )
+
+    def test_already_canceled(self):
+        group = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[
+                {
+                    "type": Operation.WITHDRAW,
+                    "amount": Decimal("-10.75"),
+                    "canceled_at": timezone.now(),
+                }
+            ],
+        )
+        operation = group.opes.get()
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+
+        self.assertDictEqual(
+            json_data["warnings"], {"already_canceled": [operation.pk]}
+        )
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("50.00"))
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("100.00"))
+
+    @mock.patch("django.utils.timezone.now")
+    def test_checkout_before_last_statement(self, now_mock):
+        now_mock.return_value = self.now
+        group = create_operation_group(
+            at=self.now,
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[{"type": Operation.WITHDRAW, "amount": Decimal("-10.75")}],
+        )
+        operation = group.opes.get()
+        now_mock.return_value += timedelta(seconds=30)
+        create_checkout_statement(checkout=self.checkout)
+        now_mock.return_value += timedelta(seconds=30)
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+
+        self.assertEqual(len(json_data["canceled"]), 1)
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("60.75"))
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("100.00"))
+
+    @mock.patch("django.utils.timezone.now")
+    def test_article_before_last_inventory(self, now_mock):
+        now_mock.return_value = self.now
+        group = create_operation_group(
+            at=self.now,
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[
+                {"type": Operation.PURCHASE, "article": self.article, "article_nb": 2}
+            ],
+        )
+        operation = group.opes.get()
+        now_mock.return_value += timedelta(seconds=30)
+        create_inventory_article(article=self.article)
+        now_mock.return_value += timedelta(seconds=30)
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+
+        self.assertEqual(len(json_data["canceled"]), 1)
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("55.00"))
+        self.article.refresh_from_db()
+        self.assertEqual(self.article.stock, 20)
+
+    def test_negative(self):
+        kfet_config.set(overdraft_amount=Decimal("40.00"))
+        user_add_perms(self.users["team"], ["kfet.perform_negative_operations"])
+        self.account.balance = Decimal("-20.00")
+        self.account.save()
+        group = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[{"type": Operation.DEPOSIT, "amount": Decimal("10.75")}],
+        )
+        operation = group.opes.get()
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+
+        self.assertEqual(len(json_data["canceled"]), 1)
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("-30.75"))
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("89.25"))
+
+    def test_invalid_negative_above_thresholds(self):
+        kfet_config.set(overdraft_amount=Decimal("5.00"))
+        user_add_perms(self.users["team"], ["kfet.perform_negative_operations"])
+        self.account.balance = Decimal("-20.00")
+        self.account.save()
+        group = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[{"type": Operation.DEPOSIT, "amount": Decimal("10.75")}],
+        )
+        operation = group.opes.get()
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        self.assertEqual(resp.status_code, 403)
+        json_data = json.loads(resp.content.decode("utf-8"))
+        self.assertEqual(json_data["errors"], {"negative": [self.account.trigramme]})
+
+    def test_invalid_negative_requires_perms(self):
+        kfet_config.set(overdraft_amount=Decimal("40.00"))
+        self.account.balance = Decimal("-20.00")
+        self.account.save()
+        group = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[{"type": Operation.DEPOSIT, "amount": Decimal("10.75")}],
+        )
+        operation = group.opes.get()
+
+        data = {"operations[]": [str(operation.pk)]}
+        resp = self.client.post(self.url, data)
+
+        self.assertEqual(resp.status_code, 403)
+        json_data = json.loads(resp.content.decode("utf-8"))
+        self.assertEqual(
+            json_data["errors"],
+            {"missing_perms": ["Enregistrer des commandes en négatif"]},
+        )
+
+    def test_partial_0(self):
+        group = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[
+                {"type": Operation.PURCHASE, "article": self.article, "article_nb": 2},
+                {"type": Operation.DEPOSIT, "amount": Decimal("10.75")},
+                {"type": Operation.EDIT, "amount": Decimal("-6.00")},
+                {
+                    "type": Operation.WITHDRAW,
+                    "amount": Decimal("-10.75"),
+                    "canceled_at": timezone.now(),
+                },
+            ],
+        )
+        operation1 = group.opes.get(type=Operation.PURCHASE)
+        operation2 = group.opes.get(type=Operation.EDIT)
+        operation3 = group.opes.get(type=Operation.WITHDRAW)
+
+        data = {
+            "operations[]": [str(operation1.pk), str(operation2.pk), str(operation3.pk)]
+        }
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+
+        group.refresh_from_db()
+        self.assertEqual(group.amount, Decimal("10.75"))
+        self.assertEqual(group.opes.exclude(canceled_at=None).count(), 3)
+
+        self.assertDictEqual(
+            json_data,
+            {
+                "canceled": [operation1.pk, operation2.pk],
+                "warnings": {"already_canceled": [operation3.pk]},
+                "errors": {},
+            },
+        )
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("61.00"))
+        self.article.refresh_from_db()
+        self.assertEqual(self.article.stock, 22)
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("100.00"))
+
+    def test_multi_0(self):
+        group1 = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[
+                {"type": Operation.PURCHASE, "article": self.article, "article_nb": 2},
+                {"type": Operation.DEPOSIT, "amount": Decimal("10.75")},
+                {"type": Operation.EDIT, "amount": Decimal("-6.00")},
+            ],
+        )
+        operation11 = group1.opes.get(type=Operation.PURCHASE)
+        group2 = create_operation_group(
+            on_acc=self.account,
+            checkout=self.checkout,
+            content=[
+                {"type": Operation.PURCHASE, "article": self.article, "article_nb": 5},
+                {"type": Operation.DEPOSIT, "amount": Decimal("3.00")},
+            ],
+        )
+        operation21 = group2.opes.get(type=Operation.PURCHASE)
+        operation22 = group2.opes.get(type=Operation.DEPOSIT)
+
+        data = {
+            "operations[]": [
+                str(operation11.pk),
+                str(operation21.pk),
+                str(operation22.pk),
+            ]
+        }
+        resp = self.client.post(self.url, data)
+
+        json_data = self._assertResponseOk(resp)
+
+        group1.refresh_from_db()
+        self.assertEqual(group1.amount, Decimal("4.75"))
+        self.assertEqual(group1.opes.exclude(canceled_at=None).count(), 1)
+        group2.refresh_from_db()
+        self.assertEqual(group2.amount, Decimal(0))
+        self.assertEqual(group2.opes.exclude(canceled_at=None).count(), 2)
+
+        self.assertEqual(len(json_data["canceled"]), 3)
+
+        self.account.refresh_from_db()
+        self.assertEqual(self.account.balance, Decimal("64.50"))
+        self.article.refresh_from_db()
+        self.assertEqual(self.article.stock, 27)
+        self.checkout.refresh_from_db()
+        self.assertEqual(self.checkout.balance, Decimal("97.00"))
 
 
 class KPsulArticlesData(ViewTestCaseMixin, TestCase):
diff --git a/kfet/tests/utils.py b/kfet/tests/utils.py
index f1b6933a..79ca1b5e 100644
--- a/kfet/tests/utils.py
+++ b/kfet/tests/utils.py
@@ -1,7 +1,21 @@
+from datetime import timedelta
+from decimal import Decimal
+
 from django.contrib.auth import get_user_model
 from django.contrib.auth.models import Permission
+from django.utils import timezone
 
-from ..models import Account
+from ..models import (
+    Account,
+    Article,
+    ArticleCategory,
+    Checkout,
+    CheckoutStatement,
+    Inventory,
+    InventoryArticle,
+    Operation,
+    OperationGroup,
+)
 
 User = get_user_model()
 
@@ -184,3 +198,180 @@ def user_add_perms(user, perms_labels):
     # it to avoid using of the previous permissions cache.
     # https://docs.djangoproject.com/en/dev/topics/auth/default/#permission-caching
     return User.objects.get(pk=user.pk)
+
+
+def create_checkout(**kwargs):
+    """
+    Factory to create a checkout.
+    See defaults for unpassed arguments in code below.
+    """
+    if "created_by" not in kwargs or "created_by_id" not in kwargs:
+        try:
+            team_account = Account.objects.get(cofprofile__user__username="team")
+        except Account.DoesNotExist:
+            team_account = create_team().profile.account_kfet
+        kwargs["created_by"] = team_account
+    kwargs.setdefault("name", "Checkout")
+    kwargs.setdefault("valid_from", timezone.now() - timedelta(days=14))
+    kwargs.setdefault("valid_to", timezone.now() - timedelta(days=14))
+
+    return Checkout.objects.create(**kwargs)
+
+
+def create_operation_group(content=None, **kwargs):
+    """
+    Factory to create an OperationGroup and a set of related Operation.
+
+    It aims to get objects for testing purposes with minimal setup, and
+    preserving consistency.
+    For this, it uses, and creates if necessary, default objects for unpassed
+    arguments.
+
+    Args:
+        content: list of dict
+            Describe set of Operation to create along the OperationGroup.
+            Each item is passed to the Operation factory.
+        kwargs:
+            Used to control OperationGroup creation.
+
+    """
+    if content is None:
+        content = []
+
+    # Prepare OperationGroup creation.
+
+    # Set 'checkout' for OperationGroup if unpassed.
+    if "checkout" not in kwargs and "checkout_id" not in kwargs:
+        try:
+            checkout = Checkout.objects.get(name="Checkout")
+        except Checkout.DoesNotExist:
+            checkout = create_checkout()
+        kwargs["checkout"] = checkout
+
+    # Set 'on_acc' for OperationGroup if unpassed.
+    if "on_acc" not in kwargs and "on_acc_id" not in kwargs:
+        try:
+            on_acc = Account.objects.get(cofprofile__user__username="user")
+        except Account.DoesNotExist:
+            on_acc = create_user().profile.account_kfet
+        kwargs["on_acc"] = on_acc
+
+    # Set 'is_cof' for OperationGroup if unpassed.
+    if "is_cof" not in kwargs:
+        # Use current is_cof status of 'on_acc'.
+        kwargs["is_cof"] = kwargs["on_acc"].cofprofile.is_cof
+
+    # Create OperationGroup.
+    group = OperationGroup.objects.create(**kwargs)
+
+    # We can now create objects referencing this OperationGroup.
+
+    # Process set of related Operation.
+    if content:
+        # Create them.
+        operation_list = []
+        for operation_kwargs in content:
+            operation = create_operation(group=group, **operation_kwargs)
+            operation_list.append(operation)
+
+        # Update OperationGroup accordingly, for consistency.
+        for operation in operation_list:
+            if not operation.canceled_at:
+                group.amount += operation.amount
+        group.save()
+
+    return group
+
+
+def create_operation(**kwargs):
+    """
+    Factory to create an Operation for testing purposes.
+
+    If you give a 'group' (OperationGroup), it won't update it, you have do
+    this "manually". Prefer using OperationGroup factory to get a consistent
+    group with operations.
+
+    """
+    if "group" not in kwargs and "group_id" not in kwargs:
+        # To get a consistent OperationGroup (amount...) for the operation
+        # in-creation, prefer using create_operation_group factory with
+        # 'content'.
+        kwargs["group"] = create_operation_group()
+
+    if "type" not in kwargs:
+        raise RuntimeError("Can't create an Operation without 'type'.")
+
+    # Apply defaults for purchase
+    if kwargs["type"] == Operation.PURCHASE:
+        if "article" not in kwargs:
+            raise NotImplementedError(
+                "One could write a create_article factory. Right now, you must"
+                "pass an 'article'."
+            )
+
+        # Unpassed 'article_nb' defaults to 1.
+        kwargs.setdefault("article_nb", 1)
+
+        # Unpassed 'amount' will use current article price and quantity.
+        if "amount" not in kwargs:
+            if "addcost_for" in kwargs or "addcost_amount" in kwargs:
+                raise NotImplementedError(
+                    "One could handle the case where 'amount' is missing and "
+                    "addcost applies. Right now, please pass an 'amount'."
+                )
+            kwargs["amount"] = -kwargs["article"].price * kwargs["article_nb"]
+
+    return Operation.objects.create(**kwargs)
+
+
+def create_checkout_statement(**kwargs):
+    if "checkout" not in kwargs:
+        kwargs["checkout"] = create_checkout()
+    if "by" not in kwargs:
+        try:
+            team_account = Account.objects.get(cofprofile__user__username="team")
+        except Account.DoesNotExist:
+            team_account = create_team().profile.account_kfet
+        kwargs["by"] = team_account
+    kwargs.setdefault("balance_new", kwargs["checkout"].balance)
+    kwargs.setdefault("balance_old", kwargs["checkout"].balance)
+    kwargs.setdefault("amount_taken", Decimal(0))
+
+    return CheckoutStatement.objects.create(**kwargs)
+
+
+def create_article(**kwargs):
+    kwargs.setdefault("name", "Article")
+    kwargs.setdefault("price", Decimal("2.50"))
+    kwargs.setdefault("stock", 20)
+    if "category" not in kwargs:
+        kwargs["category"] = create_article_category()
+
+    return Article.objects.create(**kwargs)
+
+
+def create_article_category(**kwargs):
+    kwargs.setdefault("name", "Category")
+    return ArticleCategory.objects.create(**kwargs)
+
+
+def create_inventory(**kwargs):
+    if "by" not in kwargs:
+        try:
+            team_account = Account.objects.get(cofprofile__user__username="team")
+        except Account.DoesNotExist:
+            team_account = create_team().profile.account_kfet
+        kwargs["by"] = team_account
+
+    return Inventory.objects.create(**kwargs)
+
+
+def create_inventory_article(**kwargs):
+    if "inventory" not in kwargs:
+        kwargs["inventory"] = create_inventory()
+    if "article" not in kwargs:
+        kwargs["article"] = create_article()
+    kwargs.setdefault("stock_old", kwargs["article"].stock)
+    kwargs.setdefault("stock_new", kwargs["article"].stock)
+
+    return InventoryArticle.objects.create(**kwargs)
diff --git a/petitscours/__init__.py b/petitscours/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/gestioncof/petits_cours_forms.py b/petitscours/forms.py
similarity index 95%
rename from gestioncof/petits_cours_forms.py
rename to petitscours/forms.py
index b9cfc067..5309b41d 100644
--- a/gestioncof/petits_cours_forms.py
+++ b/petitscours/forms.py
@@ -4,7 +4,7 @@ from django.contrib.auth.models import User
 from django.forms import ModelForm
 from django.forms.models import BaseInlineFormSet, inlineformset_factory
 
-from gestioncof.petits_cours_models import PetitCoursAbility, PetitCoursDemande
+from petitscours.models import PetitCoursAbility, PetitCoursDemande
 
 
 class BaseMatieresFormSet(BaseInlineFormSet):
diff --git a/gestioncof/petits_cours_models.py b/petitscours/models.py
similarity index 77%
rename from gestioncof/petits_cours_models.py
rename to petitscours/models.py
index 40031877..c3bdce2f 100644
--- a/gestioncof/petits_cours_models.py
+++ b/petitscours/models.py
@@ -3,6 +3,7 @@ from functools import reduce
 from django.contrib.auth.models import User
 from django.db import models
 from django.db.models import Min
+from django.utils.functional import cached_property
 from django.utils.translation import ugettext_lazy as _
 
 
@@ -16,6 +17,7 @@ LEVELS_CHOICES = (
     ("prepa1styear", _("Prépa 1ère année / L1")),
     ("prepa2ndyear", _("Prépa 2ème année / L2")),
     ("licence3", _("Licence 3")),
+    ("master1", _("Master (1ère ou 2ème année)")),
     ("other", _("Autre (préciser dans les commentaires)")),
 )
 
@@ -27,6 +29,7 @@ class PetitCoursSubject(models.Model):
     )
 
     class Meta:
+        app_label = "gestioncof"
         verbose_name = "Matière de petits cours"
         verbose_name_plural = "Matières des petits cours"
 
@@ -45,6 +48,7 @@ class PetitCoursAbility(models.Model):
     agrege = models.BooleanField(_("Agrégé"), default=False)
 
     class Meta:
+        app_label = "gestioncof"
         verbose_name = "Compétence petits cours"
         verbose_name_plural = "Compétences des petits cours"
 
@@ -53,6 +57,12 @@ class PetitCoursAbility(models.Model):
             self.user.username, self.matiere, self.niveau
         )
 
+    @cached_property
+    def counter(self) -> int:
+        """Le compteur d'attribution associé au professeur pour cette matière."""
+
+        return PetitCoursAttributionCounter.get_uptodate(self.user, self.matiere).count
+
 
 class PetitCoursDemande(models.Model):
     name = models.CharField(_("Nom/prénom"), max_length=200)
@@ -126,7 +136,44 @@ class PetitCoursDemande(models.Model):
             candidates = candidates.order_by("?").select_related().all()
             yield (matiere, candidates)
 
+    def get_proposals(self, *, max_candidates: int = None, redo: bool = False):
+        """Calcule une proposition de profs pour la demande.
+
+        Args:
+            max_candidates (optionnel; défaut: `None`):  Le nombre maximum de
+                candidats à proposer par demande.  Si `None` ou non spécifié,
+                il n'y a pas de limite.
+
+            redo (optionel; défaut: `False`):  Détermine si on re-calcule les
+                propositions pour la demande (les professeurs à qui on a déjà
+                proposé cette demande sont exclus).
+
+        Returns:
+            proposals:  Le dictionnaire qui associe à chaque matière la liste
+                des professeurs proposés.  Les matières pour lesquelles aucun
+                professeur n'est disponible ne sont pas présentes dans
+                `proposals`.
+            unsatisfied:  La liste des matières pour lesquelles aucun
+                professeur n'est disponible.
+        """
+
+        proposals = {}
+        unsatisfied = []
+        for matiere, candidates in self.get_candidates(redo=redo):
+            if not candidates:
+                unsatisfied.append(matiere)
+            else:
+                proposals[matiere] = matiere_proposals = []
+
+                candidates = sorted(candidates, key=lambda c: c.counter)
+                candidates = candidates[:max_candidates]
+                for candidate in candidates[:max_candidates]:
+                    matiere_proposals.append(candidate.user)
+
+        return proposals, unsatisfied
+
     class Meta:
+        app_label = "gestioncof"
         verbose_name = "Demande de petits cours"
         verbose_name_plural = "Demandes de petits cours"
 
@@ -147,6 +194,7 @@ class PetitCoursAttribution(models.Model):
     selected = models.BooleanField(_("Sélectionné par le demandeur"), default=False)
 
     class Meta:
+        app_label = "gestioncof"
         verbose_name = "Attribution de petits cours"
         verbose_name_plural = "Attributions de petits cours"
 
@@ -182,6 +230,7 @@ class PetitCoursAttributionCounter(models.Model):
         return counter
 
     class Meta:
+        app_label = "gestioncof"
         verbose_name = "Compteur d'attribution de petits cours"
         verbose_name_plural = "Compteurs d'attributions de petits cours"
 
diff --git a/gestioncof/templates/base_title_petitscours.html b/petitscours/templates/petitscours/base_title.html
similarity index 100%
rename from gestioncof/templates/base_title_petitscours.html
rename to petitscours/templates/petitscours/base_title.html
diff --git a/gestioncof/templates/demande-petit-cours.html b/petitscours/templates/petitscours/demande.html
similarity index 100%
rename from gestioncof/templates/demande-petit-cours.html
rename to petitscours/templates/petitscours/demande.html
diff --git a/gestioncof/templates/gestioncof/details_demande_petit_cours.html b/petitscours/templates/petitscours/demande_detail.html
similarity index 93%
rename from gestioncof/templates/gestioncof/details_demande_petit_cours.html
rename to petitscours/templates/petitscours/demande_detail.html
index b51c0dc0..e82a67d4 100644
--- a/gestioncof/templates/gestioncof/details_demande_petit_cours.html
+++ b/petitscours/templates/petitscours/demande_detail.html
@@ -1,11 +1,11 @@
-{% extends "base_title_petitscours.html" %}
+{% extends "petitscours/base_title.html" %}
 {% load staticfiles %}
 
 {% block page_size %}col-sm-8{% endblock %}
 
 {% block realcontent %}
     <h2>Demande de petits cours</h2>
-    {% include "details_demande_petit_cours_infos.html" %}
+    {% include "petitscours/details_demande_infos.html" %}
     <hr />
     <table class="table table-striped">
         <tr><td><strong>Traitée</strong></td><td> <img src="{% if demande.traitee %}{% static "images/yes.png" %}{% else %}{% static "images/no.png" %}{% endif %}" /></td></tr>
diff --git a/gestioncof/templates/petits_cours_demandes_list.html b/petitscours/templates/petitscours/demande_list.html
similarity index 97%
rename from gestioncof/templates/petits_cours_demandes_list.html
rename to petitscours/templates/petitscours/demande_list.html
index 92e934f5..74654e44 100644
--- a/gestioncof/templates/petits_cours_demandes_list.html
+++ b/petitscours/templates/petitscours/demande_list.html
@@ -1,4 +1,4 @@
-{% extends "base_title_petitscours.html" %}
+{% extends "petitscours/base_title.html" %}
 {% load staticfiles %}
 
 {% block realcontent %}
diff --git a/gestioncof/templates/demande-petit-cours-raw.html b/petitscours/templates/petitscours/demande_raw.html
similarity index 100%
rename from gestioncof/templates/demande-petit-cours-raw.html
rename to petitscours/templates/petitscours/demande_raw.html
diff --git a/gestioncof/templates/details_demande_petit_cours_infos.html b/petitscours/templates/petitscours/details_demande_infos.html
similarity index 100%
rename from gestioncof/templates/details_demande_petit_cours_infos.html
rename to petitscours/templates/petitscours/details_demande_infos.html
diff --git a/gestioncof/templates/inscription-petit-cours.html b/petitscours/templates/petitscours/inscription.html
similarity index 98%
rename from gestioncof/templates/inscription-petit-cours.html
rename to petitscours/templates/petitscours/inscription.html
index 4ac0a874..c4920fb3 100644
--- a/gestioncof/templates/inscription-petit-cours.html
+++ b/petitscours/templates/petitscours/inscription.html
@@ -94,7 +94,7 @@ var django = {
         <form class="form-horizontal  petit-cours_form" id="bda_form" method="post" action="{% url 'petits-cours-inscription' %}">
                 {% csrf_token %}
                 <div class="table-top" style="margin-left:0px; margin-right:0px; font-size: 1.25em; font-weight: bold; color: #DE826B;"><input type="checkbox" name="receive_proposals" {% if receive_proposals %}checked="checked"{% endif %} /> Recevoir des propositions de petits cours</div>
-                {% include "inscription-petit-cours-formset.html" %}
+                {% include "petitscours/inscription_formset.html" %}
                 <div class="inscription-bottom">
                     <input type="button" class="btn btn-default pull-right" value="Ajouter une autre matière" id="add_more" />
                     <script>
diff --git a/gestioncof/templates/inscription-petit-cours-formset.html b/petitscours/templates/petitscours/inscription_formset.html
similarity index 100%
rename from gestioncof/templates/inscription-petit-cours-formset.html
rename to petitscours/templates/petitscours/inscription_formset.html
diff --git a/gestioncof/templates/gestioncof/traitement_demande_petit_cours.html b/petitscours/templates/petitscours/traitement_demande.html
similarity index 94%
rename from gestioncof/templates/gestioncof/traitement_demande_petit_cours.html
rename to petitscours/templates/petitscours/traitement_demande.html
index 4be36a13..ef80b27b 100644
--- a/gestioncof/templates/gestioncof/traitement_demande_petit_cours.html
+++ b/petitscours/templates/petitscours/traitement_demande.html
@@ -1,8 +1,8 @@
-{% extends "base_title_petitscours.html" %}
+{% extends "petitscours/base_title.html" %}
 
 {% block realcontent %}
     <h2>Traitement de la demande de petits cours {{ demande.id }}</h2>
-    {% include "details_demande_petit_cours_infos.html" %}
+    {% include "petitscours/details_demande_infos.html" %}
     <hr />
     {% if errors %}
     <div class="error">
diff --git a/gestioncof/templates/gestioncof/traitement_demande_petit_cours_autre_niveau.html b/petitscours/templates/petitscours/traitement_demande_autre_niveau.html
similarity index 95%
rename from gestioncof/templates/gestioncof/traitement_demande_petit_cours_autre_niveau.html
rename to petitscours/templates/petitscours/traitement_demande_autre_niveau.html
index c2c7e734..e1cc43fb 100644
--- a/gestioncof/templates/gestioncof/traitement_demande_petit_cours_autre_niveau.html
+++ b/petitscours/templates/petitscours/traitement_demande_autre_niveau.html
@@ -1,9 +1,9 @@
-{% extends "base_title_petitscours.html" %}
+{% extends "petitscours/base_title.html" %}
 {% load staticfiles %}
 
 {% block realcontent %}
     <h2>Traitement de la demande de petits cours {{ demande.id }}</h2>
-    {% include "details_demande_petit_cours_infos.html" %}
+    {% include "petitscours/details_demande_infos.html" %}
     <hr />
     <div class="error">
         Attention: demande de petits cours spécifiant le niveau "Autre niveau": choisissez les candidats correspondant aux remarques de la demande. S'il y a moins de 3 candidats adaptés, ne mettre que ceux qui conviennent, pas besoin de faire du bourrage :)
diff --git a/gestioncof/templates/gestioncof/traitement_demande_petit_cours_success.html b/petitscours/templates/petitscours/traitement_demande_success.html
similarity index 89%
rename from gestioncof/templates/gestioncof/traitement_demande_petit_cours_success.html
rename to petitscours/templates/petitscours/traitement_demande_success.html
index 2ef6e807..9d2ded41 100644
--- a/gestioncof/templates/gestioncof/traitement_demande_petit_cours_success.html
+++ b/petitscours/templates/petitscours/traitement_demande_success.html
@@ -1,4 +1,4 @@
-{% extends "base_title_petitscours.html" %}
+{% extends "petitscours/base_title.html" %}
 
 {% block realcontent %}
     <h2>Traitement de la demande de petits cours {{ demande.id }}</h2>
diff --git a/petitscours/tests/__init__.py b/petitscours/tests/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/petitscours/tests/test_petitscours_views.py b/petitscours/tests/test_petitscours_views.py
new file mode 100644
index 00000000..9a3cc3dc
--- /dev/null
+++ b/petitscours/tests/test_petitscours_views.py
@@ -0,0 +1,344 @@
+import json
+import os
+
+from django.contrib import messages
+from django.contrib.auth import get_user_model
+from django.test import Client, TestCase
+from django.urls import reverse
+
+from gestioncof.tests.testcases import ViewTestCaseMixin
+
+from .utils import (
+    PetitCoursTestHelpers,
+    create_petitcours_ability,
+    create_petitcours_demande,
+    create_petitcours_subject,
+)
+
+User = get_user_model()
+
+
+class PetitCoursDemandeListViewTestCase(ViewTestCaseMixin, TestCase):
+    url_name = "petits-cours-demandes-list"
+    url_expected = "/petitcours/demandes"
+
+    auth_user = "staff"
+    auth_forbidden = [None, "user", "member"]
+
+    def setUp(self):
+        super().setUp()
+        self.demande1 = create_petitcours_demande()
+        self.demande2 = create_petitcours_demande()
+        self.demande3 = create_petitcours_demande()
+
+    def test_get(self):
+        resp = self.client.get(self.url)
+        self.assertEqual(resp.status_code, 200)
+        self.assertEqual(len(resp.context["object_list"]), 3)
+
+
+class PetitCoursDemandeDetailListViewTestCase(ViewTestCaseMixin, TestCase):
+    url_name = "petits-cours-demande-details"
+
+    auth_user = "staff"
+    auth_forbidden = [None, "user", "member"]
+
+    @property
+    def url_kwargs(self):
+        return {"pk": self.demande.pk}
+
+    @property
+    def url_expected(self):
+        return "/petitcours/demandes/{}".format(self.demande.pk)
+
+    def setUp(self):
+        super().setUp()
+        self.demande = create_petitcours_demande()
+
+    def test_get(self):
+        resp = self.client.get(self.url)
+        self.assertEqual(resp.status_code, 200)
+
+
+class PetitCoursInscriptionViewTestCase(ViewTestCaseMixin, TestCase):
+    url_name = "petits-cours-inscription"
+    url_expected = "/petitcours/inscription"
+
+    http_methods = ["GET", "POST"]
+
+    auth_user = "member"
+    # Also forbidden for "user". Test below.
+    auth_forbidden = [None]
+
+    def setUp(self):
+        super().setUp()
+        self.user = self.users["member"]
+        self.cofprofile = self.user.profile
+
+        self.subject1 = create_petitcours_subject(name="Matière 1")
+        self.subject2 = create_petitcours_subject(name="Matière 2")
+
+    def test_get_forbidden_user_not_cof(self):
+        self.client.force_login(self.users["user"])
+        resp = self.client.get(self.url)
+        self.assertRedirects(resp, reverse("cof-denied"))
+
+    def test_get(self):
+        resp = self.client.get(self.url)
+        self.assertEqual(resp.status_code, 200)
+
+    @property
+    def base_post_data(self):
+        return {
+            "petitcoursability_set-TOTAL_FORMS": "3",
+            "petitcoursability_set-INITIAL_FORMS": "0",
+            "petitcoursability_set-MIN_NUM_FORMS": "0",
+            "petitcoursability_set-MAX_NUM_FORMS": "1000",
+            "remarques": "",
+        }
+
+    def test_post(self):
+        data = dict(
+            self.base_post_data,
+            **{
+                "petitcoursability_set-TOTAL_FORMS": "2",
+                "petitcoursability_set-0-id": "",
+                "petitcoursability_set-0-user": "",
+                "petitcoursability_set-0-matiere": str(self.subject1.pk),
+                "petitcoursability_set-0-niveau": "college",
+                "petitcoursability_set-0-agrege": "1",
+                # "petitcoursability_set-0-DELETE": "1",
+                "petitcoursability_set-1-id": "",
+                "petitcoursability_set-1-user": "",
+                "petitcoursability_set-1-matiere": str(self.subject2.pk),
+                "petitcoursability_set-1-niveau": "lycee",
+                # "petitcoursability_set-1-agrege": "1",
+                # "petitcoursability_set-1-DELETE": "1",
+                # "receive_proposals": "1",
+                "remarques": "Une remarque",
+            },
+        )
+        resp = self.client.post(self.url, data)
+
+        self.assertEqual(resp.status_code, 200)
+        self.cofprofile.refresh_from_db()
+        self.assertEqual(self.cofprofile.petits_cours_accept, False)
+        self.assertEqual(self.cofprofile.petits_cours_remarques, "Une remarque")
+        self.assertEqual(self.user.petitcoursability_set.count(), 2)
+        ability1 = self.user.petitcoursability_set.get(matiere=self.subject1)
+        self.assertEqual(ability1.niveau, "college")
+        self.assertTrue(ability1.agrege)
+        ability2 = self.user.petitcoursability_set.get(matiere=self.subject2)
+        self.assertEqual(ability2.niveau, "lycee")
+        self.assertFalse(ability2.agrege)
+
+    def test_post_delete(self):
+        ability1 = create_petitcours_ability(user=self.user)
+        ability2 = create_petitcours_ability(user=self.user)
+
+        data = dict(
+            self.base_post_data,
+            **{
+                "petitcoursability_set-INITIAL_FORMS": "2",
+                "petitcoursability_set-TOTAL_FORMS": "2",
+                "petitcoursability_set-0-id": str(ability1.pk),
+                "petitcoursability_set-0-user": "",
+                "petitcoursability_set-0-matiere": str(self.subject1.pk),
+                "petitcoursability_set-0-niveau": "college",
+                "petitcoursability_set-0-agrege": "1",
+                "petitcoursability_set-0-DELETE": "1",
+                "petitcoursability_set-1-id": str(ability2.pk),
+                "petitcoursability_set-1-user": str(self.user.pk),
+                "petitcoursability_set-1-matiere": str(self.subject2.pk),
+                "petitcoursability_set-1-niveau": "lycee",
+                # "petitcoursability_set-1-agrege": "1",
+                "petitcoursability_set-1-DELETE": "1",
+            },
+        )
+        resp = self.client.post(self.url, data)
+
+        self.assertEqual(resp.status_code, 200)
+        self.assertFalse(self.user.petitcoursability_set.all())
+
+
+class PetitCoursTraitementViewTestCase(
+    ViewTestCaseMixin, PetitCoursTestHelpers, TestCase
+):
+    url_name = "petits-cours-demande-traitement"
+
+    http_methods = ["GET", "POST"]
+
+    auth_user = "staff"
+    auth_forbidden = [None, "user", "member"]
+
+    @property
+    def url_kwargs(self):
+        return {"demande_id": self.demande.pk}
+
+    @property
+    def url_expected(self):
+        return "/petitcours/demandes/{}/traitement".format(self.demande.pk)
+
+    def setUp(self):
+        super().setUp()
+        self.user = self.users["member"]
+        self.user.profile.petits_cours_accept = True
+        self.user.profile.save()
+        self.subject = create_petitcours_subject()
+        self.demande = create_petitcours_demande(niveau="college")
+        self.demande.matieres.add(self.subject)
+
+    def test_get(self):
+        self.require_custommails()
+
+        resp = self.client.get(self.url)
+        self.assertEqual(resp.status_code, 200)
+
+    def test_get_with_match(self):
+        self.require_custommails()
+
+        create_petitcours_ability(
+            user=self.user, matiere=self.subject, niveau="college"
+        )
+
+        resp = self.client.get(self.url)
+
+        self.assertEqual(resp.status_code, 200)
+        self.assertListEqual(
+            list(resp.context["proposals"]), [(self.subject, [self.user])]
+        )
+        self.assertEqual(
+            resp.context["attribdata"], json.dumps([(self.subject.id, [self.user.id])])
+        )
+
+    def test_post_with_match(self):
+        self.require_custommails()
+
+        create_petitcours_ability(
+            user=self.user, matiere=self.subject, niveau="college"
+        )
+
+        data = {
+            "attribdata": json.dumps([(self.subject.pk, [self.user.pk])]),
+            "extra": "",
+        }
+        resp = self.client.post(self.url, data)
+
+        self.assertEqual(resp.status_code, 200)
+        self.demande.refresh_from_db()
+        self.assertTrue(self.demande.traitee)
+        self.assertEqual(self.demande.traitee_par, self.users["staff"])
+        self.assertIsNotNone(self.demande.processed)
+
+
+class PetitCoursRetraitementViewTestCase(
+    ViewTestCaseMixin, PetitCoursTestHelpers, TestCase
+):
+    url_name = "petits-cours-demande-retraitement"
+
+    http_methods = ["GET", "POST"]
+
+    auth_user = "staff"
+    auth_forbidden = [None, "user", "member"]
+
+    @property
+    def url_kwargs(self):
+        return {"demande_id": self.demande.pk}
+
+    @property
+    def url_expected(self):
+        return "/petitcours/demandes/{}/retraitement".format(self.demande.pk)
+
+    def setUp(self):
+        super().setUp()
+        self.demande = create_petitcours_demande()
+
+    def test_get(self):
+        self.require_custommails()
+
+        resp = self.client.get(self.url)
+        self.assertEqual(resp.status_code, 200)
+
+
+class PetitCoursDemandeViewTestCase(ViewTestCaseMixin, TestCase):
+    url_name = "petits-cours-demande"
+    url_expected = "/petitcours/demande"
+
+    http_methods = ["GET", "POST"]
+
+    auth_user = None
+    auth_forbidden = []
+
+    def setUp(self):
+        super().setUp()
+        os.environ["RECAPTCHA_TESTING"] = "True"
+        self.subject1 = create_petitcours_subject()
+        self.subject2 = create_petitcours_subject()
+
+    def tearDown(self):
+        os.environ["RECAPTCHA_TESTING"] = "False"
+
+    def test_get(self):
+        resp = self.client.get(self.url)
+        self.assertEqual(resp.status_code, 200)
+
+    def test_post(self):
+        data = {
+            "name": "Le nom",
+            "email": "lemail@mail.net",
+            "phone": "0123456789",
+            "quand": "matin, midi et soir",
+            "freq": "tous les jours",
+            "lieu": "partout",
+            "matieres": [str(self.subject1.pk), str(self.subject2.pk)],
+            "agrege_requis": "1",
+            "niveau": "lycee",
+            "remarques": "no comment",
+            "g-recaptcha-response": "PASSED",
+        }
+        resp = self.client.post(self.url, data)
+
+        self.assertEqual(resp.status_code, 200)
+        self.assertTrue(resp.context["success"], msg=str(resp.context["form"].errors))
+
+
+class PetitCoursDemandeRawViewTestCase(ViewTestCaseMixin, TestCase):
+    url_name = "petits-cours-demande-raw"
+    url_expected = "/petitcours/demande-raw"
+
+    http_methods = ["GET", "POST"]
+
+    auth_user = None
+    auth_forbidden = []
+
+    def setUp(self):
+        super().setUp()
+        os.environ["RECAPTCHA_TESTING"] = "True"
+        self.subject1 = create_petitcours_subject()
+        self.subject2 = create_petitcours_subject()
+
+    def tearDown(self):
+        os.environ["RECAPTCHA_TESTING"] = "False"
+
+    def test_get(self):
+        resp = self.client.get(self.url)
+        self.assertEqual(resp.status_code, 200)
+
+    def test_post(self):
+        data = {
+            "name": "Le nom",
+            "email": "lemail@mail.net",
+            "phone": "0123456789",
+            "quand": "matin, midi et soir",
+            "freq": "tous les jours",
+            "lieu": "partout",
+            "matieres": [str(self.subject1.pk), str(self.subject2.pk)],
+            "agrege_requis": "1",
+            "niveau": "lycee",
+            "remarques": "no comment",
+            "g-recaptcha-response": "PASSED",
+        }
+        resp = self.client.post(self.url, data)
+
+        self.assertEqual(resp.status_code, 200)
+        self.assertTrue(resp.context["success"], msg=str(resp.context["form"].errors))
diff --git a/petitscours/tests/utils.py b/petitscours/tests/utils.py
new file mode 100644
index 00000000..99113f9e
--- /dev/null
+++ b/petitscours/tests/utils.py
@@ -0,0 +1,39 @@
+import os
+
+from django.conf import settings
+from django.core.management import call_command
+
+from petitscours.models import (
+    PetitCoursAbility,
+    PetitCoursAttributionCounter,
+    PetitCoursDemande,
+    PetitCoursSubject,
+)
+
+
+def create_petitcours_ability(**kwargs):
+    if "user" not in kwargs:
+        kwargs["user"] = create_user()
+    if "matiere" not in kwargs:
+        kwargs["matiere"] = create_petitcours_subject()
+    if "niveau" not in kwargs:
+        kwargs["niveau"] = "college"
+    ability = PetitCoursAbility.objects.create(**kwargs)
+    PetitCoursAttributionCounter.get_uptodate(ability.user, ability.matiere)
+    return ability
+
+
+def create_petitcours_demande(**kwargs):
+    return PetitCoursDemande.objects.create(**kwargs)
+
+
+def create_petitcours_subject(**kwargs):
+    return PetitCoursSubject.objects.create(**kwargs)
+
+
+class PetitCoursTestHelpers:
+    def require_custommails(self):
+        data_file = os.path.join(
+            settings.BASE_DIR, "gestioncof", "management", "data", "custommail.json"
+        )
+        call_command("syncmails", data_file, verbosity=0)
diff --git a/petitscours/urls.py b/petitscours/urls.py
new file mode 100644
index 00000000..f230846e
--- /dev/null
+++ b/petitscours/urls.py
@@ -0,0 +1,37 @@
+from django.conf.urls import url
+
+from gestioncof.decorators import buro_required
+from petitscours import views
+from petitscours.views import DemandeDetailView, DemandeListView
+
+urlpatterns = [
+    url(r"^inscription$", views.inscription, name="petits-cours-inscription"),
+    url(r"^demande$", views.demande, name="petits-cours-demande"),
+    url(
+        r"^demande-raw$",
+        views.demande,
+        kwargs={"raw": True},
+        name="petits-cours-demande-raw",
+    ),
+    url(
+        r"^demandes$",
+        buro_required(DemandeListView.as_view()),
+        name="petits-cours-demandes-list",
+    ),
+    url(
+        r"^demandes/(?P<pk>\d+)$",
+        buro_required(DemandeDetailView.as_view()),
+        name="petits-cours-demande-details",
+    ),
+    url(
+        r"^demandes/(?P<demande_id>\d+)/traitement$",
+        views.traitement,
+        name="petits-cours-demande-traitement",
+    ),
+    url(
+        r"^demandes/(?P<demande_id>\d+)/retraitement$",
+        views.traitement,
+        kwargs={"redo": True},
+        name="petits-cours-demande-retraitement",
+    ),
+]
diff --git a/gestioncof/petits_cours_views.py b/petitscours/views.py
similarity index 65%
rename from gestioncof/petits_cours_views.py
rename to petitscours/views.py
index d640981a..e309f24a 100644
--- a/gestioncof/petits_cours_views.py
+++ b/petitscours/views.py
@@ -14,8 +14,8 @@ from django.views.generic import DetailView, ListView
 
 from gestioncof.decorators import buro_required
 from gestioncof.models import CofProfile
-from gestioncof.petits_cours_forms import DemandeForm, MatieresFormSet
-from gestioncof.petits_cours_models import (
+from petitscours.forms import DemandeForm, MatieresFormSet
+from petitscours.models import (
     PetitCoursAbility,
     PetitCoursAttribution,
     PetitCoursAttributionCounter,
@@ -27,7 +27,7 @@ class DemandeListView(ListView):
     queryset = PetitCoursDemande.objects.prefetch_related("matieres").order_by(
         "traitee", "-id"
     )
-    template_name = "petits_cours_demandes_list.html"
+    template_name = "petitscours/demande_list.html"
     paginate_by = 20
 
 
@@ -36,7 +36,7 @@ class DemandeDetailView(DetailView):
     queryset = PetitCoursDemande.objects.prefetch_related(
         "petitcoursattribution_set", "matieres"
     )
-    template_name = "gestioncof/details_demande_petit_cours.html"
+    template_name = "petitscours/demande_detail.html"
     context_object_name = "demande"
 
     def get_context_data(self, **kwargs):
@@ -53,64 +53,27 @@ def traitement(request, demande_id, redo=False):
         return _traitement_other(request, demande, redo)
     if request.method == "POST":
         return _traitement_post(request, demande)
-    proposals = {}
-    proposed_for = {}
-    unsatisfied = []
-    attribdata = {}
-    for matiere, candidates in demande.get_candidates(redo):
-        if candidates:
-            tuples = []
-            for candidate in candidates:
-                user = candidate.user
-                tuples.append(
-                    (
-                        candidate,
-                        PetitCoursAttributionCounter.get_uptodate(user, matiere),
-                    )
-                )
-            tuples = sorted(tuples, key=lambda c: c[1].count)
-            candidates, _ = zip(*tuples)
-            candidates = candidates[0 : min(3, len(candidates))]
-            attribdata[matiere.id] = []
-            proposals[matiere] = []
-            for candidate in candidates:
-                user = candidate.user
-                proposals[matiere].append(user)
-                attribdata[matiere.id].append(user.id)
-                if user not in proposed_for:
-                    proposed_for[user] = [matiere]
-                else:
-                    proposed_for[user].append(matiere)
-        else:
-            unsatisfied.append(matiere)
-    return _finalize_traitement(
-        request, demande, proposals, proposed_for, unsatisfied, attribdata, redo
-    )
-
-
-@buro_required
-def retraitement(request, demande_id):
-    return traitement(request, demande_id, redo=True)
+    proposals, unsatisfied = demande.get_proposals(redo=redo, max_candidates=3)
+    return _finalize_traitement(request, demande, proposals, unsatisfied, redo)
 
 
 def _finalize_traitement(
-    request,
-    demande,
-    proposals,
-    proposed_for,
-    unsatisfied,
-    attribdata,
-    redo=False,
-    errors=None,
+    request, demande, proposals, unsatisfied, redo=False, errors=None
 ):
-    proposals = proposals.items()
-    proposed_for = proposed_for.items()
-    attribdata = list(attribdata.items())
+    attribdata = [
+        (matiere.id, [user.id for user in users])
+        for matiere, users in proposals.items()
+    ]
+    proposed_for = {}
+    for matiere, users in proposals.items():
+        for user in users:
+            proposed_for.setdefault(user, []).append(matiere)
+
     proposed_mails = _generate_eleve_email(demande, proposed_for)
     mainmail = render_custom_mail(
         "petits-cours-mail-demandeur",
         {
-            "proposals": proposals,
+            "proposals": proposals.items(),
             "unsatisfied": unsatisfied,
             "extra": '<textarea name="extra" '
             'style="width:99%; height: 90px;">'
@@ -122,12 +85,12 @@ def _finalize_traitement(
             messages.error(request, error)
     return render(
         request,
-        "gestioncof/traitement_demande_petit_cours.html",
+        "petitscours/traitement_demande.html",
         {
             "demande": demande,
             "unsatisfied": unsatisfied,
-            "proposals": proposals,
-            "proposed_for": proposed_for,
+            "proposals": proposals.items(),
+            "proposed_for": proposed_for.items(),
             "proposed_mails": proposed_mails,
             "mainmail": mainmail,
             "attribdata": json.dumps(attribdata),
@@ -144,7 +107,7 @@ def _generate_eleve_email(demande, proposed_for):
                 "petit-cours-mail-eleve", {"demande": demande, "matieres": matieres}
             ),
         )
-        for user, matieres in proposed_for
+        for user, matieres in proposed_for.items()
     ]
 
 
@@ -152,15 +115,12 @@ def _traitement_other_preparing(request, demande):
     redo = "redo" in request.POST
     unsatisfied = []
     proposals = {}
-    proposed_for = {}
-    attribdata = {}
     errors = []
     for matiere, candidates in demande.get_candidates(redo):
         if candidates:
             candidates = dict(
                 [(candidate.user.id, candidate.user) for candidate in candidates]
             )
-            attribdata[matiere.id] = []
             proposals[matiere] = []
             for choice_id in range(min(3, len(candidates))):
                 choice = int(
@@ -183,11 +143,6 @@ def _traitement_other_preparing(request, demande):
                     )
                     continue
                 proposals[matiere].append(user)
-                attribdata[matiere.id].append(user.id)
-                if user not in proposed_for:
-                    proposed_for[user] = [matiere]
-                else:
-                    proposed_for[user].append(matiere)
             if not proposals[matiere]:
                 errors.append("Aucune proposition pour {!s}".format(matiere))
             elif len(proposals[matiere]) < 3:
@@ -200,15 +155,7 @@ def _traitement_other_preparing(request, demande):
                 )
         else:
             unsatisfied.append(matiere)
-    return _finalize_traitement(
-        request,
-        demande,
-        proposals,
-        proposed_for,
-        unsatisfied,
-        attribdata,
-        errors=errors,
-    )
+    return _finalize_traitement(request, demande, proposals, unsatisfied, errors=errors)
 
 
 def _traitement_other(request, demande, redo):
@@ -217,45 +164,14 @@ def _traitement_other(request, demande, redo):
             return _traitement_other_preparing(request, demande)
         else:
             return _traitement_post(request, demande)
-    proposals = {}
-    proposed_for = {}
-    unsatisfied = []
-    attribdata = {}
-    for matiere, candidates in demande.get_candidates(redo):
-        if candidates:
-            tuples = []
-            for candidate in candidates:
-                user = candidate.user
-                tuples.append(
-                    (
-                        candidate,
-                        PetitCoursAttributionCounter.get_uptodate(user, matiere),
-                    )
-                )
-            tuples = sorted(tuples, key=lambda c: c[1].count)
-            candidates, _ = zip(*tuples)
-            attribdata[matiere.id] = []
-            proposals[matiere] = []
-            for candidate in candidates:
-                user = candidate.user
-                proposals[matiere].append(user)
-                attribdata[matiere.id].append(user.id)
-                if user not in proposed_for:
-                    proposed_for[user] = [matiere]
-                else:
-                    proposed_for[user].append(matiere)
-        else:
-            unsatisfied.append(matiere)
-    proposals = proposals.items()
-    proposed_for = proposed_for.items()
+    proposals, unsatisfied = demande.get_proposals(redo=redo)
     return render(
         request,
-        "gestioncof/traitement_demande_petit_cours_autre_niveau.html",
+        "petitscours/traitement_demande_autre_niveau.html",
         {
             "demande": demande,
             "unsatisfied": unsatisfied,
-            "proposals": proposals,
-            "proposed_for": proposed_for,
+            "proposals": proposals.items(),
         },
     )
 
@@ -280,12 +196,10 @@ def _traitement_post(request, demande):
                     proposed_for[user] = [matiere]
                 else:
                     proposed_for[user].append(matiere)
-    proposals_list = proposals.items()
-    proposed_for = proposed_for.items()
     proposed_mails = _generate_eleve_email(demande, proposed_for)
     mainmail_object, mainmail_body = render_custom_mail(
         "petits-cours-mail-demandeur",
-        {"proposals": proposals_list, "unsatisfied": unsatisfied, "extra": extra},
+        {"proposals": proposals.items(), "unsatisfied": unsatisfied, "extra": extra},
     )
     frommail = settings.MAIL_DATA["petits_cours"]["FROM"]
     bccaddress = settings.MAIL_DATA["petits_cours"]["BCC"]
@@ -314,8 +228,9 @@ def _traitement_post(request, demande):
     connection = mail.get_connection(fail_silently=False)
     connection.send_messages(mails_to_send)
     with transaction.atomic():
-        for matiere in proposals:
-            for rank, user in enumerate(proposals[matiere]):
+        for matiere, users in proposals.items():
+            for rank, user in enumerate(users):
+                # TODO(AD): Prefer PetitCoursAttributionCounter.get_uptodate()
                 counter = PetitCoursAttributionCounter.objects.get(
                     user=user, matiere=matiere
                 )
@@ -331,7 +246,7 @@ def _traitement_post(request, demande):
     demande.save()
     return render(
         request,
-        "gestioncof/traitement_demande_petit_cours_success.html",
+        "petitscours/traitement_demande_success.html",
         {"demande": demande, "redo": redo},
     )
 
@@ -361,7 +276,7 @@ def inscription(request):
         formset = MatieresFormSet(instance=request.user)
     return render(
         request,
-        "inscription-petit-cours.html",
+        "petitscours/inscription.html",
         {
             "formset": formset,
             "success": success,
@@ -372,7 +287,7 @@ def inscription(request):
 
 
 @csrf_exempt
-def demande(request):
+def demande(request, *, raw: bool = False):
     success = False
     if request.method == "POST":
         form = DemandeForm(request.POST)
@@ -381,21 +296,7 @@ def demande(request):
             success = True
     else:
         form = DemandeForm()
-    return render(
-        request, "demande-petit-cours.html", {"form": form, "success": success}
-    )
-
-
-@csrf_exempt
-def demande_raw(request):
-    success = False
-    if request.method == "POST":
-        form = DemandeForm(request.POST)
-        if form.is_valid():
-            form.save()
-            success = True
-    else:
-        form = DemandeForm()
-    return render(
-        request, "demande-petit-cours-raw.html", {"form": form, "success": success}
-    )
+    template_name = "petitscours/demande.html"
+    if raw:
+        template_name = "petitscours/demande_raw.html"
+    return render(request, template_name, {"form": form, "success": success})
diff --git a/requirements.txt b/requirements.txt
index c73d5832..4d443d16 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,9 +3,9 @@ Django==1.11.*
 django-autocomplete-light==3.1.3
 django-autoslug==1.9.3
 django-cas-ng==3.5.7
-django-djconfig==0.5.3
+django-djconfig==0.8.0
 django-recaptcha==1.4.0
-django-redis-cache==1.7.1
+django-redis-cache==1.8.1
 icalendar
 psycopg2
 Pillow
diff --git a/setup.cfg b/setup.cfg
index ec29c73c..d45e6862 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -4,6 +4,7 @@ source =
   cof
   gestioncof
   kfet
+  petitscours
   shared
   utils
 omit =
@@ -33,7 +34,7 @@ default_section = THIRDPARTY
 force_grid_wrap = 0
 include_trailing_comma = true
 known_django = django
-known_first_party = bda,cof,gestioncof,kfet,shared,utils
+known_first_party = bda,cof,gestioncof,kfet,petitscours,shared,utils
 line_length = 88
 multi_line_output = 3
 not_skip = __init__.py