diff --git a/ordr3/__init__.py b/ordr3/__init__.py
index df0f4c8..951a213 100644
--- a/ordr3/__init__.py
+++ b/ordr3/__init__.py
@@ -11,8 +11,7 @@ from pyramid.session import JSONSerializer, SignedCookieSessionFactory
 
 
 def main(global_config, **settings):
-    """ This function returns a Pyramid WSGI application.
-    """
+    """This function returns a Pyramid WSGI application."""
     with Configurator(settings=settings) as config:
 
         session_factory = SignedCookieSessionFactory(
diff --git a/ordr3/events.py b/ordr3/events.py
index a323c8e..97c3571 100644
--- a/ordr3/events.py
+++ b/ordr3/events.py
@@ -105,7 +105,7 @@ def emit(request, event):
 
 
 def includeme(config):
-    """ initializing Events sytem for the Pyramid app
+    """initializing Events sytem for the Pyramid app
 
     Activate this setup using ``config.include('ordr2.events')``.
     """
diff --git a/ordr3/routes.py b/ordr3/routes.py
index c9987c6..a4ef405 100644
--- a/ordr3/routes.py
+++ b/ordr3/routes.py
@@ -1,5 +1,5 @@
 def includeme(config):
-    """ Initialize routes in a Pyramid app.
+    """Initialize routes in a Pyramid app.
 
     Activate this setup using ``config.include('ordr3.routes')``.
 
diff --git a/ordr3/schemas/__init__.py b/ordr3/schemas/__init__.py
index 5028b0f..4315f54 100644
--- a/ordr3/schemas/__init__.py
+++ b/ordr3/schemas/__init__.py
@@ -5,7 +5,7 @@ from pkg_resources import resource_filename
 
 
 def includeme(config):
-    """ Defining form templates overrides
+    """Defining form templates overrides
 
     Activate this setup using ``config.include('ordr3.schemas')``.
     """
diff --git a/ordr3/schemas/orders.py b/ordr3/schemas/orders.py
index 3142cbd..c1c3499 100644
--- a/ordr3/schemas/orders.py
+++ b/ordr3/schemas/orders.py
@@ -11,7 +11,7 @@ STATI = [(s.name, s.name.capitalize()) for s in OrderStatus]
 
 
 class OrderStatus(colander.Schema):
-    """ schema for editing order status
+    """schema for editing order status
 
     parital schema, used in EditOrderSchema
     """
@@ -28,7 +28,7 @@ class OrderStatus(colander.Schema):
 
 
 class OrderItem(colander.Schema):
-    """ schema for editing order information
+    """schema for editing order information
 
     parital schema, used in NewOrderSchema and EditOrderSchema
     """
@@ -116,7 +116,7 @@ class MoneyInputSchema(colander.Schema):
 
 
 class OrderPricing(colander.Schema):
-    """ schema for editing price information
+    """schema for editing price information
 
     parital schema, used in NewOrderSchema and EditOrderSchema
     """
@@ -140,7 +140,7 @@ class OrderPricing(colander.Schema):
 
 
 class OrderOptionals(colander.Schema):
-    """ schema for editing optional information
+    """schema for editing optional information
 
     parital schema, used in NewOrderSchema and EditOrderSchema
     """
diff --git a/ordr3/security.py b/ordr3/security.py
index 861f190..dc51263 100644
--- a/ordr3/security.py
+++ b/ordr3/security.py
@@ -11,7 +11,7 @@ class AuthenticationPolicy(AuthTktAuthenticationPolicy):
     """ How to authenticate users """
 
     def authenticated_userid(self, request):
-        """ returns the id of an authenticated user
+        """returns the id of an authenticated user
 
         heavy lifting done in get_user() attached to request
         """
@@ -50,7 +50,7 @@ def get_passlib_context():
 
 
 def includeme(config):
-    """ initializing authentication and authorization for the Pyramid app
+    """initializing authentication and authorization for the Pyramid app
 
     Activate this setup using ``config.include('ordr2.security')``.
     """
diff --git a/ordr3/services.py b/ordr3/services.py
index 236fbaa..f5f78c9 100644
--- a/ordr3/services.py
+++ b/ordr3/services.py
@@ -12,7 +12,7 @@ CONSUMABLE_STATI = {models.OrderStatus.ORDERED, models.OrderStatus.COMPLETED}
 
 
 MSG_SHORT_PASSWORD = events.FlashMessage.warning(
-    f"Your password is quite short.",
+    "Your password is quite short.",
     (
         'Have a look at <a href="https://www.xkcd.com/936/">'
         "this comic strip</a> why longer passwords are better."
@@ -132,7 +132,7 @@ def set_new_password(user, password, event_queue):
 
 
 def check_have_i_been_pwned(password, event_queue):
-    """ public function for checking haveibeenpwned
+    """public function for checking haveibeenpwned
 
     this is just a small shim to eas testing"""
     password_hash = hashlib.sha1(password.encode()).hexdigest()
@@ -140,7 +140,7 @@ def check_have_i_been_pwned(password, event_queue):
 
 
 def _check_have_i_been_pwned(password_hash, event_queue):
-    """ chech haveibeenpwned for password leak
+    """chech haveibeenpwned for password leak
 
     This function does the heavy lifting for check_have_i_been_pwned()
     """
diff --git a/ordr3/views/__init__.py b/ordr3/views/__init__.py
index 5a24813..50c8b90 100644
--- a/ordr3/views/__init__.py
+++ b/ordr3/views/__init__.py
@@ -61,7 +61,7 @@ def jinja_nl2br(text, replacement="<br>"):
 
 
 def includeme(config):
-    """ adding request helpers
+    """adding request helpers
 
     Activate this setup using ``config.include('ordr3.views')``.
     """
diff --git a/tests/functional/conftest.py b/tests/functional/conftest.py
index e6ae9e7..c276e60 100644
--- a/tests/functional/conftest.py
+++ b/tests/functional/conftest.py
@@ -41,6 +41,7 @@ def _pyramid_app():
 @pytest.fixture
 def _sqlite_repo(_pyramid_app):
     from pyramid.scripting import prepare
+
     from ordr3 import adapters
 
     with prepare() as env:
@@ -52,9 +53,10 @@ def _sqlite_repo(_pyramid_app):
 
 @pytest.fixture
 def _example_data(_sqlite_repo):
-    from ordr3 import models, security
     from datetime import datetime, timedelta
 
+    from ordr3 import models, security
+
     today = datetime.utcnow()
 
     crypt_context = security.get_passlib_context()
diff --git a/tests/test_adapters.py b/tests/test_adapters.py
index 0dc44b8..3fe7ae8 100644
--- a/tests/test_adapters.py
+++ b/tests/test_adapters.py
@@ -23,7 +23,7 @@ def order_sql():
 
 
 def test_order_mapper(session, order_sql):
-    from ordr3.models import OrderItem, OrderCategory, OrderStatus
+    from ordr3.models import OrderItem, OrderStatus, OrderCategory
 
     session.execute(order_sql)
     expected = [
@@ -119,7 +119,7 @@ def test_user_mapper(session):
 
 
 def test_adapter_behaviour(session):
-    from ordr3.models import OrderItem, OrderCategory, OrderStatus, LogEntry
+    from ordr3.models import LogEntry, OrderItem, OrderStatus, OrderCategory
 
     order = OrderItem(
         None,
diff --git a/tests/test_models.py b/tests/test_models.py
index 9d135a2..e014c51 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -39,7 +39,7 @@ def test_orderitem_total_price():
 
 
 def test_orderitem_add_to_log_empty_log():
-    from ordr3.models import OrderItem, LogEntry
+    from ordr3.models import LogEntry, OrderItem
 
     order = OrderItem(*list("ABCDEFGHIJK"))
     log_entry = LogEntry(order, "critical", "me", "yesterday")
@@ -51,7 +51,7 @@ def test_orderitem_add_to_log_empty_log():
 
 
 def test_orderitem_add_to_log_non_empty_log():
-    from ordr3.models import OrderItem, LogEntry
+    from ordr3.models import LogEntry, OrderItem
 
     order = OrderItem(*list("ABCDEFGHIJK"))
     log_entry_1 = LogEntry(order, "critical", "me", "yesterday")
@@ -203,9 +203,10 @@ def test_password_reset_token_init():
 
 
 def test_password_reset_token_init_auto_validity():
-    from ordr3.models import PasswordResetToken
     from datetime import datetime, timedelta
 
+    from ordr3.models import PasswordResetToken
+
     token = PasswordResetToken(*list("AB"))
 
     assert token.token == "A"
@@ -222,9 +223,10 @@ def test_password_reset_token_is_valid_ok():
 
 
 def test_password_reset_token_is_valid_not_ok():
-    from ordr3.models import PasswordResetToken
     from datetime import datetime, timedelta
 
+    from ordr3.models import PasswordResetToken
+
     invalid_time = datetime.utcnow() - timedelta(hours=1)
     token = PasswordResetToken(*list("AB"), invalid_time)
 
@@ -240,9 +242,10 @@ def test_password_reset_token_is_valid_invalid_time_format():
 
 
 def test_password_reset_token_repr():
-    from ordr3.models import PasswordResetToken
     from datetime import datetime
 
+    from ordr3.models import PasswordResetToken
+
     valid_until = datetime(2020, 4, 2, 10, 11, 12)
     token = PasswordResetToken(*list("AB"), valid_until)
 
diff --git a/tests/test_repo.py b/tests/test_repo.py
index e411c36..58688c4 100644
--- a/tests/test_repo.py
+++ b/tests/test_repo.py
@@ -4,7 +4,8 @@ import pytest
 @pytest.fixture()
 def example_order_data():
     from datetime import datetime
-    from ordr3.models import OrderCategory, OrderStatus
+
+    from ordr3.models import OrderStatus, OrderCategory
 
     return [
         (
@@ -52,6 +53,7 @@ def example_orders(example_order_data):
 @pytest.fixture()
 def example_consumables(example_order_data):
     from datetime import datetime, timedelta
+
     from ordr3.models import OrderItem
 
     consumables = []
@@ -77,9 +79,10 @@ def example_users():
 
 @pytest.fixture()
 def example_tokens():
-    from ordr3.models import PasswordResetToken
     from datetime import datetime, timedelta
 
+    from ordr3.models import PasswordResetToken
+
     valid = datetime.utcnow() + timedelta(days=2)
     invalid = datetime.utcnow() - timedelta(days=2)
 
@@ -116,8 +119,8 @@ def test_sql_repo_add_order(session, example_orders):
 
 def test_sql_repo_delete_order(session, example_orders):
     from ordr3.repo import SqlAlchemyRepository
+    from ordr3.models import User, LogEntry, OrderItem, OrderStatus
     from ordr3.services import create_log_entry
-    from ordr3.models import LogEntry, OrderStatus, User, OrderItem
 
     repo = SqlAlchemyRepository(session)
     repo.add_order(example_orders[0])
@@ -146,7 +149,7 @@ def test_sql_repo_get_order(session, example_orders):
 
 
 def test_sql_repo_get_order_raises_exception(session, example_orders):
-    from ordr3.repo import SqlAlchemyRepository, RepoItemNotFound
+    from ordr3.repo import RepoItemNotFound, SqlAlchemyRepository
 
     repo = SqlAlchemyRepository(session)
     repo.add_order(example_orders[0])
@@ -157,9 +160,10 @@ def test_sql_repo_get_order_raises_exception(session, example_orders):
 
 
 def test_sql_list_consumable_candidates(session, example_consumables):
+    from datetime import datetime, timedelta
+
     from ordr3.repo import SqlAlchemyRepository
     from ordr3.models import OrderStatus
-    from datetime import datetime, timedelta
 
     repo = SqlAlchemyRepository(session)
     for example in example_consumables:
@@ -215,7 +219,7 @@ def test_sql_repo_get_user(session, example_users):
 
 
 def test_sql_repo_get_user_raises_exception(session, example_users):
-    from ordr3.repo import SqlAlchemyRepository, RepoItemNotFound
+    from ordr3.repo import RepoItemNotFound, SqlAlchemyRepository
 
     repo = SqlAlchemyRepository(session)
     repo.add_user(example_users[0])
@@ -237,7 +241,7 @@ def test_sql_repo_get_user_by_username(session, example_users):
 
 
 def test_sql_repo_get_user_by_username_exception(session, example_users):
-    from ordr3.repo import SqlAlchemyRepository, RepoItemNotFound
+    from ordr3.repo import RepoItemNotFound, SqlAlchemyRepository
 
     repo = SqlAlchemyRepository(session)
     repo.add_user(example_users[0])
@@ -259,7 +263,7 @@ def test_sql_repo_get_user_by_email(session, example_users):
 
 
 def test_sql_repo_get_user_by_email_exception(session, example_users):
-    from ordr3.repo import SqlAlchemyRepository, RepoItemNotFound
+    from ordr3.repo import RepoItemNotFound, SqlAlchemyRepository
 
     repo = SqlAlchemyRepository(session)
     repo.add_user(example_users[0])
@@ -311,7 +315,7 @@ def test_sql_get_vendor_aggregates(session, example_vendors):
 
 
 def test_sql_get_vendor_aggregates_raises_error(session):
-    from ordr3.repo import SqlAlchemyRepository, RepoItemNotFound
+    from ordr3.repo import RepoItemNotFound, SqlAlchemyRepository
 
     repo = SqlAlchemyRepository(session)
 
@@ -383,7 +387,7 @@ def test_sql_repo_get_reset_token(session, example_tokens):
 
 
 def test_sql_repo_get_reset_token_raises_exception(session, example_tokens):
-    from ordr3.repo import SqlAlchemyRepository, RepoItemNotFound
+    from ordr3.repo import RepoItemNotFound, SqlAlchemyRepository
 
     repo = SqlAlchemyRepository(session)
     repo.add_reset_token(example_tokens[0])
diff --git a/tests/test_services.py b/tests/test_services.py
index 77ce8d1..bb6feee 100644
--- a/tests/test_services.py
+++ b/tests/test_services.py
@@ -116,7 +116,8 @@ class FakeEventQueue(list):
 @pytest.fixture
 def prefilled_repo():
     from itertools import count
-    from ordr3.models import OrderItem, OrderStatus, Vendor
+
+    from ordr3.models import Vendor, OrderItem, OrderStatus
 
     i = count()
     catalog = {1: "Ethanol", 2: "Aceton", 3: "NaOH", 4: "Coffee", 5: "Water"}
@@ -165,8 +166,8 @@ def test_service_find_consumables(prefilled_repo):
 
 
 def test_create_log_entry_noteworthy(prefilled_repo):
+    from ordr3.models import User, OrderStatus
     from ordr3.services import create_log_entry
-    from ordr3.models import OrderStatus, User
 
     order = prefilled_repo.get_order(1)
     user_1 = User(*list("ABCDEFG"))
@@ -190,8 +191,8 @@ def test_create_log_entry_noteworthy(prefilled_repo):
 
 
 def test_create_log_entry_not_noteworthy_same_user(prefilled_repo):
+    from ordr3.models import User, OrderStatus
     from ordr3.services import create_log_entry
-    from ordr3.models import OrderStatus, User
 
     order = prefilled_repo.get_order(1)
     user = User(*list("ABCDEFG"))
@@ -203,8 +204,8 @@ def test_create_log_entry_not_noteworthy_same_user(prefilled_repo):
 
 
 def test_create_log_entry_not_noteworthy_same_status(prefilled_repo):
+    from ordr3.models import User, OrderStatus
     from ordr3.services import create_log_entry
-    from ordr3.models import OrderStatus, User
 
     order = prefilled_repo.get_order(1)
     user = User(*list("ABCDEFG"))
@@ -398,7 +399,7 @@ def test_set_new_password_to_short_and_breached(monkeypatch):
 
 def test_get_user_from_reset_token_ok():
     from ordr3 import services
-    from ordr3.models import PasswordResetToken, User
+    from ordr3.models import User, PasswordResetToken
 
     repo = FakeOrderRepository(None)
     user = User(*list("ABCDEFG"))
@@ -413,7 +414,7 @@ def test_get_user_from_reset_token_ok():
 
 def test_get_user_from_reset_token_wrong_token():
     from ordr3 import services
-    from ordr3.models import PasswordResetToken, User
+    from ordr3.models import User, PasswordResetToken
 
     repo = FakeOrderRepository(None)
     user = User(*list("ABCDEFG"))
@@ -427,10 +428,11 @@ def test_get_user_from_reset_token_wrong_token():
 
 
 def test_get_user_from_reset_token_invalid_token():
-    from ordr3 import services
-    from ordr3.models import PasswordResetToken, User
     from datetime import datetime, timedelta
 
+    from ordr3 import services
+    from ordr3.models import User, PasswordResetToken
+
     repo = FakeOrderRepository(None)
     user = User(*list("ABCDEFG"))
     repo.add_user(user)
@@ -445,7 +447,7 @@ def test_get_user_from_reset_token_invalid_token():
 
 def test_get_user_from_reset_token_unknown_user():
     from ordr3 import services
-    from ordr3.models import PasswordResetToken, User
+    from ordr3.models import User, PasswordResetToken
 
     repo = FakeOrderRepository(None)
     user = User(*list("ABCDEFG"))
@@ -459,8 +461,8 @@ def test_get_user_from_reset_token_unknown_user():
 
 
 def test_create_token_for_user():
+    from ordr3.models import User, PasswordResetToken
     from ordr3.services import create_token_for_user
-    from ordr3.models import PasswordResetToken, User
 
     repo = FakeOrderRepository(None)
     user = User(*list("ABCDEFG"))