diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7b295d9e..e5be0b74 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,13 +7,14 @@ test:
   - env
   - apt-get update
   - apt-get install -y gettext libxapian-dev libgraphviz-dev
-  - pip install .[testing]
+  - pip install poetry
+  - poetry install -E testing
   - mkdir -p /dev/shm/search_indexes
   - ln -s /dev/shm/search_indexes sith/search_indexes
-  - ./manage.py compilemessages
-  - coverage run ./manage.py test
-  - coverage html
-  - coverage report
+  - poetry run ./manage.py compilemessages
+  - poetry run coverage run ./manage.py test
+  - poetry run coverage html
+  - poetry run coverage report
   variables:
     PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip_tests"
   cache:
diff --git a/club/tests.py b/club/tests.py
index 33e6016e..10ccde0c 100644
--- a/club/tests.py
+++ b/club/tests.py
@@ -161,10 +161,10 @@ class ClubTest(TestCase):
         response = self.client.get(
             reverse("club:club_members", kwargs={"club_id": self.bdf.id})
         )
-        self.assertTrue(response.status_code == 200)
-        self.assertTrue(
-            """Richard Batsbak</a></td>\\n                    <td>Vice-Pr\\xc3\\xa9sident</td>"""
-            in str(response.content)
+        self.assertEqual(response.status_code, 200)
+        self.assertIn(
+            """Richard Batsbak</a></td>\n                    <td>Vice-Président⸱e</td>""",
+            response.content.decode(),
         )
 
     def test_create_add_user_to_club_from_richard_fail(self):
@@ -369,14 +369,15 @@ class ClubTest(TestCase):
         response = self.client.get(
             reverse("club:club_members", kwargs={"club_id": self.bdf.id})
         )
-        self.assertTrue(response.status_code == 200)
-        content = str(response.content)
-        self.assertTrue(
-            "Richard Batsbak</a></td>\\n                    <td>Curieux</td>" in content
+        self.assertEqual(response.status_code, 200)
+        content = response.content.decode()
+        self.assertIn(
+            "Richard Batsbak</a></td>\n                    <td>Curieux⸱euse</td>",
+            content,
         )
-        self.assertTrue(
-            "S&#39; Kia</a></td>\\n                    <td>Responsable info</td>"
-            in content
+        self.assertIn(
+            "S&#39; Kia</a></td>\n                    <td>Responsable info</td>",
+            content,
         )
 
 
diff --git a/core/views/forms.py b/core/views/forms.py
index 955d3320..18081e01 100644
--- a/core/views/forms.py
+++ b/core/views/forms.py
@@ -118,11 +118,14 @@ class SelectFile(TextInput):
             attrs["class"] = "select_file"
         else:
             attrs = {"class": "select_file"}
-        output = '%(content)s<div name="%(name)s" class="choose_file_widget" title="%(title)s"></div>' % {
-            "content": super(SelectFile, self).render(name, value, attrs, renderer),
-            "title": _("Choose file"),
-            "name": name,
-        }
+        output = (
+            '%(content)s<div name="%(name)s" class="choose_file_widget" title="%(title)s"></div>'
+            % {
+                "content": super(SelectFile, self).render(name, value, attrs, renderer),
+                "title": _("Choose file"),
+                "name": name,
+            }
+        )
         output += (
             '<span name="'
             + name
@@ -139,11 +142,14 @@ class SelectUser(TextInput):
             attrs["class"] = "select_user"
         else:
             attrs = {"class": "select_user"}
-        output = '%(content)s<div name="%(name)s" class="choose_user_widget" title="%(title)s"></div>' % {
-            "content": super(SelectUser, self).render(name, value, attrs, renderer),
-            "title": _("Choose user"),
-            "name": name,
-        }
+        output = (
+            '%(content)s<div name="%(name)s" class="choose_user_widget" title="%(title)s"></div>'
+            % {
+                "content": super(SelectUser, self).render(name, value, attrs, renderer),
+                "title": _("Choose user"),
+                "name": name,
+            }
+        )
         output += (
             '<span name="'
             + name
diff --git a/eboutic/views.py b/eboutic/views.py
index 05c91e68..abac99ef 100644
--- a/eboutic/views.py
+++ b/eboutic/views.py
@@ -252,8 +252,6 @@ class EtransactionAutoAnswer(View):
         if (
             not "Amount" in request.GET.keys()
             or not "BasketID" in request.GET.keys()
-            or not "Auto"
-            in request.GET.keys()  # If not in the request it means the payment has been refused
             or not "Error" in request.GET.keys()
             or not "Sig" in request.GET.keys()
         ):
@@ -271,7 +269,10 @@ class EtransactionAutoAnswer(View):
             )
         except:
             return HttpResponse("Bad signature", status=400)
-        if request.GET["Error"] == "00000":
+        # Payment authorized:
+        # * 'Error' is '00000'
+        # * 'Auto' is in the request
+        if request.GET["Error"] == "00000" and "Auto" in request.GET.keys():
             try:
                 with transaction.atomic():
                     b = (
diff --git a/pyproject.toml b/pyproject.toml
index 178942af..1d642a47 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -58,7 +58,7 @@ docs = ["Sphinx", "sphinx-rtd-theme", "sphinx-copybutton"]
 [tool.poetry.dev-dependencies]
 django-debug-toolbar = "^3.2.2"
 ipython = "^7.28.0"
-black = "^21.9b0"
+black = "^22.1.0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]