diff --git a/invenio_communities/communities/dumpers/featured.py b/invenio_communities/communities/dumpers/featured.py
index 19f6cf3c8..38ccfd1ab 100644
--- a/invenio_communities/communities/dumpers/featured.py
+++ b/invenio_communities/communities/dumpers/featured.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # This file is part of Invenio.
-# Copyright (C) 2022 Graz University of Technology.
+# Copyright (C) 2022-2024 Graz University of Technology.
 #
 # Invenio is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -14,6 +14,7 @@
 
 from datetime import datetime
 
+from invenio_db import db
 from invenio_records.dumpers import SearchDumperExt
 
 from invenio_communities.communities.records.models import CommunityFeatured
@@ -30,7 +31,8 @@ def dump(self, record, data):
         """Dump featured entries."""
         now_ = datetime.utcnow()
         future_entries = (
-            CommunityFeatured.query.filter(
+            db.session.query(CommunityFeatured)
+            .filter(
                 CommunityFeatured.community_id == record.id,
                 CommunityFeatured.start_date > now_,
             )
@@ -39,7 +41,8 @@ def dump(self, record, data):
         )
 
         past_entries = (
-            CommunityFeatured.query.filter(
+            db.session.query(CommunityFeatured)
+            .filter(
                 CommunityFeatured.community_id == record.id,
                 CommunityFeatured.start_date <= now_,
             )
diff --git a/invenio_communities/communities/records/systemfields/pidslug.py b/invenio_communities/communities/records/systemfields/pidslug.py
index 83ef7af58..b69db71c6 100644
--- a/invenio_communities/communities/records/systemfields/pidslug.py
+++ b/invenio_communities/communities/records/systemfields/pidslug.py
@@ -2,6 +2,7 @@
 #
 # This file is part of Invenio.
 # Copyright (C) 2022 CERN.
+# Copyright (C) 2024 Graz University of Technology.
 #
 # Invenio is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -41,9 +42,11 @@ def resolve(self, pid_value, registered_only=True):
                 raise PIDDoesNotExistError("comid", "")
 
         with db.session.no_autoflush:  # avoid flushing the current session
-            model = self.record_cls.model_cls.query.filter_by(
-                **{field_name: pid_value}
-            ).one_or_none()
+            model = (
+                db.session.query(self.record_cls.model_cls)
+                .filter_by(**{field_name: pid_value})
+                .one_or_none()
+            )
             if model is None:
                 raise PIDDoesNotExistError("comid", str(pid_value))
             record = self.record_cls(model.data, model=model)
diff --git a/invenio_communities/communities/services/components.py b/invenio_communities/communities/services/components.py
index 4c5bdebba..c8aa71734 100644
--- a/invenio_communities/communities/services/components.py
+++ b/invenio_communities/communities/services/components.py
@@ -3,7 +3,7 @@
 # This file is part of Invenio.
 # Copyright (C) 2016-2024 CERN.
 # Copyright (C) 2022 Northwestern University.
-# Copyright (C) 2022-2023 Graz University of Technology.
+# Copyright (C) 2022-2024 Graz University of Technology.
 #
 # Invenio is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -152,7 +152,11 @@ class OAISetComponent(ServiceComponent):
     """Service component for OAI set integration."""
 
     def _retrieve_set(self, slug):
-        return OAISet.query.filter(OAISet.spec == self._create_set_spec(slug)).first()
+        return (
+            db.session.query(OAISet)
+            .filter(OAISet.spec == self._create_set_spec(slug))
+            .first()
+        )
 
     def _create_set_spec(self, community_slug):
         oai_sets_prefix = current_app.config["COMMUNITIES_OAI_SETS_PREFIX"]
diff --git a/invenio_communities/communities/services/service.py b/invenio_communities/communities/services/service.py
index e653125ec..605d9b68d 100644
--- a/invenio_communities/communities/services/service.py
+++ b/invenio_communities/communities/services/service.py
@@ -13,6 +13,7 @@
 
 from flask import current_app
 from invenio_cache.decorators import cached_with_expiration
+from invenio_db import db
 from invenio_records_resources.proxies import current_service_registry
 from invenio_records_resources.services.base import LinksTemplate
 from invenio_records_resources.services.records import (
@@ -295,7 +296,9 @@ def _get_featured_entry(self, raise_error=True, **kwargs):
         """Retrieve featured entry based on provided arguments."""
         errors = []
         try:
-            featured_entry = CommunityFeatured.query.filter_by(**kwargs).one()
+            featured_entry = (
+                db.session.query(CommunityFeatured).filter_by(**kwargs).one()
+            )
         except NoResultFound as e:
             if raise_error:
                 raise CommunityFeaturedEntryDoesNotExistError(kwargs)
@@ -345,10 +348,14 @@ def featured_list(self, identity, community_id):
         # Permissions
         self.require_permission(identity, "featured_list", record=record)
 
-        featured_entries = CommunityFeatured.query.filter(
-            CommunityFeatured.community_id == record.id,
-        ).paginate(
-            per_page=1000,
+        featured_entries = (
+            db.session.query(CommunityFeatured)
+            .filter(
+                CommunityFeatured.community_id == record.id,
+            )
+            .paginate(
+                per_page=1000,
+            )
         )
 
         return self.config.result_list_cls_featured(
diff --git a/invenio_communities/generators.py b/invenio_communities/generators.py
index 6d5cb9031..bad819125 100644
--- a/invenio_communities/generators.py
+++ b/invenio_communities/generators.py
@@ -2,7 +2,7 @@
 #
 # This file is part of Invenio.
 # Copyright (C) 2016-2024 CERN.
-# Copyright (C) 2021 Graz University of Technology.
+# Copyright (C) 2021-2024 Graz University of Technology.
 # Copyright (C) 2021 TU Wien.
 # Copyright (C) 2022 Northwestern University.
 #
diff --git a/invenio_communities/members/records/api.py b/invenio_communities/members/records/api.py
index 5bf3ac28b..499414000 100644
--- a/invenio_communities/members/records/api.py
+++ b/invenio_communities/members/records/api.py
@@ -2,7 +2,7 @@
 #
 # Copyright (C) 2022 Northwestern University.
 # Copyright (C) 2022 CERN.
-# Copyright (C) 2022 Graz University of Technology.
+# Copyright (C) 2022-2024 Graz University of Technology.
 #
 # Invenio-Communities is free software; you can redistribute it and/or modify
 # it under the terms of the MIT License; see LICENSE file for more details.
@@ -105,7 +105,7 @@ def get_memberships_from_group_ids(cls, identity, group_ids):
     def get_memberships(cls, identity):
         """Get community memberships for a given identity."""
         group_ids = []
-        user = User.query.filter(User.id == identity.id).one_or_none()
+        user = db.session.query(User).filter(User.id == identity.id).one_or_none()
         if user:
             group_ids = [r.id for r in user.roles]
 
@@ -119,9 +119,11 @@ def get_member_by_request(cls, request_id):
         """Get a membership by request id."""
         assert request_id is not None
         with db.session.no_autoflush:
-            obj = cls.model_cls.query.filter(
-                cls.model_cls.request_id == request_id
-            ).one()
+            obj = (
+                db.session.query(cls.model_cls)
+                .filter(cls.model_cls.request_id == request_id)
+                .one()
+            )
             return cls(obj.data, model=obj)
 
     @classmethod
@@ -139,7 +141,9 @@ def get_members(cls, community_id, members=None):
                 raise InvalidMemberError(m)
 
         with db.session.no_autoflush:
-            q = cls.model_cls.query.filter(cls.model_cls.community_id == community_id)
+            q = db.session.query(cls.model_cls).filter(
+                cls.model_cls.community_id == community_id
+            )
 
             # Apply user and group query if applicable
             user_q = cls.model_cls.user_id.in_(user_ids)
diff --git a/invenio_communities/members/records/models.py b/invenio_communities/members/records/models.py
index d7530a4a1..418e88bf9 100644
--- a/invenio_communities/members/records/models.py
+++ b/invenio_communities/members/records/models.py
@@ -2,7 +2,7 @@
 #
 # Copyright (C) 2022 Northwestern University.
 # Copyright (C) 2022-2024 CERN.
-# Copyright (C) 2022 Graz University of Technology.
+# Copyright (C) 2022-2024 Graz University of Technology.
 #
 # Invenio-Communities is free software; you can redistribute it and/or modify
 # it under the terms of the MIT License; see LICENSE file for more details.
@@ -105,7 +105,9 @@ def query_memberships(cls, user_id=None, group_ids=None, active=True):
     @classmethod
     def count_members(cls, community_id, role=None, active=True):
         """Count number of members."""
-        q = cls.query.filter(cls.community_id == community_id, cls.active == active)
+        q = db.session.query(cls).filter(
+            cls.community_id == community_id, cls.active == active
+        )
         if role is not None:
             q = q.filter(cls.role == role)
         return q.count()
diff --git a/invenio_communities/members/services/components.py b/invenio_communities/members/services/components.py
index f4c133b4d..c7359c32e 100644
--- a/invenio_communities/members/services/components.py
+++ b/invenio_communities/members/services/components.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # This file is part of Invenio.
-# Copyright (C) 2022 Graz University of Technology.
+# Copyright (C) 2022-2024 Graz University of Technology.
 #
 # Invenio is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -10,6 +10,7 @@
 
 from flask_principal import Identity
 from invenio_accounts.models import Role
+from invenio_db import db
 from invenio_records_resources.services.records.components import ServiceComponent
 
 from invenio_communities.members.records.api import MemberMixin
@@ -59,7 +60,7 @@ def accept_invite(self, identity, record=None, data=None, **kwargs):
     def members_add(self, identity, record=None, community=None, data=None, **kwargs):
         """On member add (only for groups)."""
         if record["type"] == "group":
-            role = Role.query.filter_by(id=record["id"]).one_or_none()
+            role = db.session.query(Role).filter_by(id=record["id"]).one_or_none()
             if role.is_managed:
                 users = role.users.all()
                 for user in users:
diff --git a/invenio_communities/members/services/service.py b/invenio_communities/members/services/service.py
index 27edcc5dc..6448b44d6 100644
--- a/invenio_communities/members/services/service.py
+++ b/invenio_communities/members/services/service.py
@@ -2,7 +2,7 @@
 #
 # Copyright (C) 2022 Northwestern University.
 # Copyright (C) 2022-2024 CERN.
-# Copyright (C) 2022-2023 Graz University of Technology.
+# Copyright (C) 2022-2024 Graz University of Technology.
 #
 # Invenio-Communities is free software; you can redistribute it and/or modify
 # it under the terms of the MIT License; see LICENSE file for more details.
@@ -14,6 +14,7 @@
 from flask import current_app
 from invenio_access.permissions import system_identity
 from invenio_accounts.models import Role
+from invenio_db import db
 from invenio_i18n import gettext as _
 from invenio_notifications.services.uow import NotificationOp
 from invenio_records_resources.services import LinksTemplate
@@ -533,6 +534,7 @@ def update(self, identity, community_id, data, uow=None, refresh=False):
 
         # Perform updates (and check permissions)
         for m in members:
+            print(f"MemberService.update m: {m}")
             self._update(identity, community, m, role, visible, uow)
 
         # Make sure we're not left owner-less if a role was changed.
@@ -731,12 +733,18 @@ def rebuild_index(self, identity, uow=None):
 
         Note: Skips (soft) deleted records.
         """
-        members = self.record_cls.model_cls.query.filter_by(is_deleted=False).all()
+        members = (
+            db.session.query(self.record_cls.model_cls)
+            .filter_by(is_deleted=False)
+            .all()
+        )
         self.indexer.bulk_index([member.id for member in members])
 
-        archived_invitations = ArchivedInvitation.model_cls.query.filter_by(
-            is_deleted=False
-        ).all()
+        archived_invitations = (
+            db.session.query(ArchivedInvitation.model_cls)
+            .filter_by(is_deleted=False)
+            .all()
+        )
         self.archive_indexer.bulk_index([inv.id for inv in archived_invitations])
 
         return True
diff --git a/invenio_communities/records/records/systemfields/communities/context.py b/invenio_communities/records/records/systemfields/communities/context.py
index ec8009396..2d03d6090 100644
--- a/invenio_communities/records/records/systemfields/communities/context.py
+++ b/invenio_communities/records/records/systemfields/communities/context.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # Copyright (C) 2021 CERN.
+# Copyright (C) 2024 Graz University of Technology.
 #
 # Invenio-Communities is free software; you can redistribute it and/or
 # modify it under the terms of the MIT License; see LICENSE file for more
@@ -8,6 +9,7 @@
 
 """Field context."""
 
+from invenio_db import db
 from invenio_records.systemfields import SystemFieldContext
 
 
@@ -25,4 +27,6 @@ class CommunitiesFieldContext(SystemFieldContext):
 
     def query_by_community(self, community_or_id):
         """Query community-record relations for a given community."""
-        return self.field._m2m_model_class.query.filter(community_id=community_or_id)
+        return db.session.query(self.field._m2m_model_class).filter(
+            community_id=community_or_id
+        )
diff --git a/invenio_communities/records/records/systemfields/communities/manager.py b/invenio_communities/records/records/systemfields/communities/manager.py
index aa291d111..9e35676dd 100644
--- a/invenio_communities/records/records/systemfields/communities/manager.py
+++ b/invenio_communities/records/records/systemfields/communities/manager.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # Copyright (C) 2021-2024 CERN.
+# Copyright (C) 2024 Graz University of Technology.
 #
 # Invenio-Communities is free software; you can redistribute it and/or
 # modify it under the terms of the MIT License; see LICENSE file for more
@@ -89,9 +90,11 @@ def remove(self, community_or_id):
         community_id = self._to_id(community_or_id)
 
         # Delete M2M row.
-        res = self._m2m_model_cls.query.filter_by(
-            community_id=community_id, record_id=self._record_id
-        ).delete()
+        res = (
+            db.session.query(self._m2m_model_cls)
+            .filter_by(community_id=community_id, record_id=self._record_id)
+            .delete()
+        )
         if res != 1:
             raise ValueError("The record has not been added to the community.")
 
@@ -105,7 +108,9 @@ def remove(self, community_or_id):
     def clear(self):
         """Clear all communities from the record."""
         # Remove all associations
-        res = self._m2m_model_cls.query.filter_by(record_id=self._record_id).delete()
+        db.session.query(self._m2m_model_cls).filter_by(
+            record_id=self._record_id
+        ).delete()
         self._communities_ids = set()
         self._default_id = None
         self._communities_cache = {}
diff --git a/invenio_communities/requests/user_moderation/actions.py b/invenio_communities/requests/user_moderation/actions.py
index 4a09cb051..2be6889e2 100644
--- a/invenio_communities/requests/user_moderation/actions.py
+++ b/invenio_communities/requests/user_moderation/actions.py
@@ -2,6 +2,7 @@
 #
 # Copyright (C) 2023-2024 CERN.
 # Copyright (C) 2023 TU Wien.
+# Copyright (C) 2024 Graz University of Technology.
 #
 # Invenio-Communities is free software; you can redistribute it and/or modify
 # it under the terms of the MIT License; see LICENSE file for more details.
@@ -10,6 +11,7 @@
 from collections import defaultdict
 
 from invenio_access.permissions import Identity, system_identity
+from invenio_db import db
 from invenio_i18n import lazy_gettext as _
 from invenio_pidstore.errors import PIDDoesNotExistError
 from invenio_search.engine import dsl
@@ -41,7 +43,9 @@ def _get_communities_for_user(user_id):
     comm_owners = defaultdict(list)
     for comm_owner in [
         mem_cls(m.data, model=m)
-        for m in mem_model_cls.query.filter(mem_model_cls.role == "owner").all()
+        for m in db.session.query(mem_model_cls)
+        .filter(mem_model_cls.role == "owner")
+        .all()
     ]:
         comm_owners[comm_owner.community_id].append(comm_owner)
 
@@ -55,9 +59,9 @@ def _get_communities_for_user(user_id):
     # resolve the communities in question
     communities = [
         comm_cls(m.data, model=m)
-        for m in comm_model_cls.query.filter(
-            comm_model_cls.id.in_(relevant_comm_ids)
-        ).all()
+        for m in db.session.query(comm_model_cls)
+        .filter(comm_model_cls.id.in_(relevant_comm_ids))
+        .all()
     ]
 
     return communities
diff --git a/invenio_communities/utils.py b/invenio_communities/utils.py
index 0d4a7dddd..11d693e37 100644
--- a/invenio_communities/utils.py
+++ b/invenio_communities/utils.py
@@ -2,6 +2,7 @@
 #
 # This file is part of Invenio.
 # Copyright (C) 2016-2022 CERN.
+# Copyright (C) 2024 Graz University of Technology.
 #
 # Invenio is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -12,6 +13,7 @@
 from flask_principal import Identity
 from invenio_accounts.models import Role
 from invenio_accounts.proxies import current_db_change_history
+from invenio_db import db
 
 from .generators import CommunityRoleNeed
 from .proxies import current_communities, current_identities_cache
@@ -105,7 +107,7 @@ def on_datastore_post_commit(sender, session):
             on_user_membership_change(Identity(user_id))
 
         for role_id in current_db_change_history.sessions[sid].deleted_roles:
-            role = Role.query.filter_by(id=role_id).one_or_none()
+            role = db.session.query(Role).filter_by(id=role_id).one_or_none()
             users = role.users.all()
             for user in users:
                 on_user_membership_change(Identity(user.id))
diff --git a/tests/communities/test_components.py b/tests/communities/test_components.py
index 6b24c7071..56da9e7d4 100644
--- a/tests/communities/test_components.py
+++ b/tests/communities/test_components.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2022 Graz University of Technology.
+# Copyright (C) 2022-2024 Graz University of Technology.
 #
 # Invenio-Communities is free software; you can redistribute it and/or modify
 # it under the terms of the MIT License; see LICENSE file for more details.
@@ -12,6 +12,7 @@
 
 import pytest
 from invenio_access.permissions import system_identity
+from invenio_db import db
 from invenio_oaiserver.models import OAISet
 from invenio_records_resources.services.errors import PermissionDeniedError
 
@@ -20,9 +21,11 @@
 
 def _retrieve_oaiset(service, community):
     comp = OAISetComponent(service)
-    return OAISet.query.filter(
-        OAISet.spec == comp._create_set_spec(community.get("slug"))
-    ).first()
+    return (
+        db.session.query(OAISet)
+        .filter(OAISet.spec == comp._create_set_spec(community.get("slug")))
+        .first()
+    )
 
 
 @pytest.fixture()
diff --git a/tests/communities/test_services.py b/tests/communities/test_services.py
index 65827447b..f2e87f6fa 100644
--- a/tests/communities/test_services.py
+++ b/tests/communities/test_services.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2022 Graz University of Technology.
+# Copyright (C) 2022-2024 Graz University of Technology.
 # Copyright (C) 2022 Northwestern University.
 #
 # Invenio-Communities is free software; you can redistribute it and/or modify
@@ -33,7 +33,7 @@
 
 
 @pytest.fixture()
-def comm(community_service, minimal_community, location):
+def comm(community_service, minimal_community, location, db):
     """Create minimal public community."""
     c = deepcopy(minimal_community)
     c["slug"] = "{slug}".format(
diff --git a/tests/conftest.py b/tests/conftest.py
index fbc5abd85..4a4bfeb45 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -2,6 +2,7 @@
 #
 # This file is part of Invenio.
 # Copyright (C) 2016-2024 CERN.
+# Copyright (C) 2024 Graz University of Technology.
 #
 # Invenio is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -234,16 +235,16 @@ def users(UserFixture, app, database):
         users[r] = u
     # when using `database` fixture (and not `db`), commit the creation of the
     # user because its implementation uses a nested session instead
-    database.session.commit()
+    # database.session.commit()
     return users
 
 
-@pytest.fixture(scope="module")
-def group(database):
+@pytest.fixture(scope="function")
+def group(db):
     """Group."""
     r = Role(id="it-dep", name="it-dep")
-    database.session.add(r)
-    database.session.commit()
+    db.session.add(r)
+    # database.session.commit()
     return r
 
 
@@ -263,7 +264,7 @@ def any_user(UserFixture, app, database):
     u.create(app, database)
     # when using `database` fixture (and not `db`), commit the creation of the
     # user because its implementation uses a nested session instead
-    database.session.commit()
+    # database.session.commit()
     u.identity  # compute identity
     return u
 
@@ -308,8 +309,6 @@ def admin_role_need(db):
     action_role = ActionRoles.create(action=action_admin_access, role=role)
     db.session.add(action_role)
 
-    db.session.commit()
-
     return action_role.need
 
 
@@ -328,13 +327,11 @@ def superuser_role_need(db):
     action_role = ActionRoles.create(action=superuser_access, role=role)
     db.session.add(action_role)
 
-    db.session.commit()
-
     return action_role.need
 
 
-@pytest.fixture(scope="module")
-def new_user(UserFixture, app, database):
+@pytest.fixture(scope="function")
+def new_user(UserFixture, app, db):
     """A new user."""
     u = UserFixture(
         email="newuser@newuser.org",
@@ -354,12 +351,13 @@ def new_user(UserFixture, app, database):
         active=True,
         confirmed=True,
     )
-    u.create(app, database)
+    u.create(app, db)
+
     # when using `database` fixture (and not `db`), commit the creation of the
     # user because its implementation uses a nested session instead
     current_users_service.indexer.process_bulk_queue()
     current_users_service.record_cls.index.refresh()
-    database.session.commit()
+    # database.session.commit()
     return u
 
 
@@ -397,7 +395,6 @@ def _create_user(data=None):
         u.create(app, db)
         current_users_service.indexer.process_bulk_queue()
         current_users_service.record_cls.index.refresh()
-        db.session.commit()
         return u
 
     return _create_user
@@ -604,7 +601,6 @@ def members(member_service, community, users, db):
     # reindexing users to make sure the user service is up-to-date
     current_users_service.indexer.process_bulk_queue()
     current_users_service.record_cls.index.refresh()
-    db.session.commit()
     return users
 
 
diff --git a/tests/members/test_members_resource.py b/tests/members/test_members_resource.py
index 808b2dc36..5bdab4fd0 100644
--- a/tests/members/test_members_resource.py
+++ b/tests/members/test_members_resource.py
@@ -2,6 +2,7 @@
 #
 # Copyright (C) 2022 Northwestern University.
 # Copyright (C) 2022-2024 CERN.
+# Copyright (C) 2024 Graz University of Technology.
 #
 # Invenio-Communities is free software; you can redistribute it and/or modify
 # it under the terms of the MIT License; see LICENSE file for more details.
@@ -60,7 +61,7 @@ def test_add_denied(client, headers, community_id, group_data, new_user):
     assert r.status_code == 403
 
 
-def test_add_bad_data(client, headers, community_id, owner):
+def test_add_bad_data(client, headers, community_id, owner, db):
     """Test add REST API."""
     client = owner.login(client)
     r = client.post(
diff --git a/tests/members/test_members_services.py b/tests/members/test_members_services.py
index 88d5e4b6f..94236eb3d 100644
--- a/tests/members/test_members_services.py
+++ b/tests/members/test_members_services.py
@@ -2,7 +2,7 @@
 #
 # Copyright (C) 2022 Northwestern University.
 # Copyright (C) 2022-2024 CERN.
-# Copyright (C) 2022-2023 Graz University of Technology.
+# Copyright (C) 2022-2024 Graz University of Technology.
 #
 # Invenio-Communities is free software; you can redistribute it and/or modify
 # it under the terms of the MIT License; see LICENSE file for more details.
@@ -111,6 +111,7 @@ def test_add_invalid_member_type(member_service, community, owner, new_user, db)
         "members": [{"type": "user", "id": str(new_user.id)}],
         "role": "reader",
     }
+
     assert pytest.raises(
         PermissionDeniedError,
         member_service.add,
@@ -618,7 +619,14 @@ def test_invite_actions_permissions(
 #
 # Leave community
 #
-@pytest.mark.parametrize("role", ["manager", "curator", "reader"])
+@pytest.mark.parametrize(
+    "role",
+    [
+        "curator",
+        "manager",
+        "reader",
+    ],
+)
 def test_leave_allowed(member_service, community, members, role):
     """Managers, curators and readers can leave."""
     user = members[role]
@@ -626,7 +634,7 @@ def test_leave_allowed(member_service, community, members, role):
     assert member_service.delete(user.identity, community._record.id, data)
 
 
-def test_leave_single_owner_denied(member_service, community, owner):
+def test_leave_single_owner_denied(member_service, community, owner, db):
     """A single owner cannot leave"""
     data = {"members": [{"type": "user", "id": str(owner.id)}]}
     pytest.raises(
@@ -757,7 +765,7 @@ def test_delete_member_type_group(member_service, community, owner, group, db):
     member_service.delete(owner.identity, community._record.id, data)
 
 
-def test_delete_invalid_member(member_service, community, owner):
+def test_delete_invalid_member(member_service, community, owner, db):
     """Invalid members and member types raises an error."""
     data = {"members": [{"type": "group", "id": "invalid"}]}
     pytest.raises(
@@ -888,7 +896,9 @@ def test_update_public_visibility_of_group_allowed(
         "members": [{"type": "group", "id": str(group.name)}],
         "role": "reader",
     }
+
     member_service.add(system_identity, community._record.id, data)
+
     # Update the member
     data = {
         "members": [{"type": "group", "id": str(group.name)}],